To join two nucleotide in a polynucleotide, phosphodiester bond is used. The correct option is B.
What is phosphodiester bond?A bond formed by a sugar group and a phosphate group; these bonds make up the sugar-phosphate-sugar backbone of DNA and RNA.
A diester bond connects two different nucleotides to form the nucleotide polymers DNA and RNA.
Thus, the correct option is B.
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Which statement best describes the relationship of photosynthesis and energy? 1. The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose. 2.The process of photosynthesis is energy-releasing because the process converts light energy into free energy that can be used for cell functions. 3.The process of photosynthesis is energy-conserving because no energy is used throughout the process of forming glucose and oxygen molecules. 4.The process of photosynthesis is energy-wasting because photosynthesis is an inefficient process that depletes the cell of energy stored in the bonds of glucose.
Answer:
3 is appropriate statement that describes photosynthesis
the correct answer for this question is 1. The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.
Which correctly describes malignant tumors?
Answer:
Malignant means that the tumor is made of cancer cells, and it can invade nearby tissues. Some cancer cells can move into the bloodstream or lymph nodes, where they can spread to other tissues within the body—this is called metastasis.
In the presence of saturating amounts of oxaloacetate, the activity of citrate synthase from pig heart tissue shows a sigmoid dependence on the concentration of acetyl‑CoA. When succinyl‑CoA is added, the curve shifts to the right and the sigmoid dependence is more pronounced.
Choose the statements that are reasonable explanations for the right-ward shift of the velocity curve caused by succinyl-CoA.
a. Succinyl-CoA competes with dissociation of CoA as a product of the reaction.
b. Succinyl-CoA binds covalently to the enzyme.
c. Succinyl-CoA binds at a regulatory site other than the active site.
d. Succinyl-CoA competes with acetyl-CoA for binding at the active site.
e. Succinyl-CoA competes with oxaloacetate for binding at the active site.
Answer:
c. Succinyl-CoA binds at a regulatory site other than the active site
Explanation:
The sigmoid saturation curve is a property of of allosteric enzymes which reflects the cooperaive interactions between the protein subunits in the enzymes.
Allosteric enzymes function through reversible, non-covalent binding of regulatory compounds called allosteric modulators.
Allosteric enzymes have different binding site for the substrate and for their allosteric modulator.
In the citric acid cycle, succinyl-CoA serves as as allosteric inhibitor of citrate synthase which catalyses the production of citrate from oxaloacetate and acetyl-CoA.
From the given options:
a. Succinyl-CoA competes with dissociation of CoA as a product of the reaction is wrong because it has its own binding site as an allosteric modulator.
b. Succinyl-CoA binds covalently to the enzyme is wrong because allosteric enzymes functions through non-covalent interactions.
c. Succinyl-CoA binds at a regulatory site other than the active site is true because citrate synthase is an allosteric enzyme
d. Succinyl-CoA competes with acetyl-CoA for binding at the active site is wrong because acetyl-CoA binds to the active site while succinyl-Coa binds to the regulatory site.
e. Succinyl-CoA competes with oxaloacetate for binding at the active site is wrong because oxaloacetate binds to the active site while succinyl-Coa binds to the regulatory site.
Why was there not a significant difference in the reaction rate with 800 mg of substrate as compared to 400 m. of substrate? What would you need to add to see an increase in the reaction rate with 800 mg of substrate?
Answer:
A. Concentration of substrate can affect the rate of reaction by two condition given below-
1. At low concentration of substrate, there will be increase in the rate of reaction by increasing the concentration of substrate. There would be catalytic site of enzyme available to bind to substrate.
2. The enzyme becomes saturated with substrate as the substrate concentration increases. At a point when the rate of product formation now depends on the activity or the available active sites of the enzyme itself, so, increasing more substrate will not leads to any effect on the rate of the reaction to any significant level.
Thus, there was not a significant difference in the reaction rate with 800 mg of substrate as compared to 400 m as at 400 mg all the catalytic site or active site are bound already.
B. Increasing the enzyme concentration will lead to increase the rate of reaction at 800 mg as there will be more active sites to bound to substrate.
Where near your home do you think the highest level of photosynthesis is happening? Think about
where in your area photosynthetic organisms are growing.
Answer:
Depends where the individual lives.
If the person lives in a rural area near a forest, photosynthesis would most likely occur in the forest.
If the person lives in an urban area in a city, a park or garden would have the highest level of photosynthesis occurring.
Answer:
There is a wonderful big park near my house with a lot of trees and plants, and I believe there is where the most photosynthesis occurs.
Explanation:
A community is a _______________________. Select one: a. group of populations b. group of ecosystems c. group of conspecific organisms d. individual form of life
Answer:
A. group of population
Explanation:
Communities are made up of all the populations of different species in a given area.
Which of the following answers correctly lists the four main types of macromolecules?
A.
DNA, RNA, triglycerides, water
B.
Monosaccharides, water, DNA, triglycerides
C.
Water, oxygen gas, ammonia, carbon
D.
Carbohydrates, lipids, proteins, nucleic acids
Answer:
D. carbohydrates, lipids, proteins, and nucleic acids[tex]hope \: it \: helps[/tex]
Answer:
D
Explanation:
They are the main types of macromolecules
Which of the following sources would be most likely to have reliable data
3. List the molarities at which water exited the potato strips. Why did water move out of the potato strips? Were these solutions hypotonic, hypertonic, or isotonic?
Answer:
The water came out of the strips of the potatoes because a process of balance and oxygen balance called osmosis occurs.
Explanation:
The potato was subjected to a hypertonic environment and it is considered hypotonic, that is why the water seeks to go out to the outside in order to generate that it finds a balance in relation to a solvent solvent.
What was an unintended negative environmental consequence of improved technology in agriculture?
A. Farmers went bankrupt purchasing expensive equipment.
B. Modern technology allowed for larger expanses of land to become cultivated, so farming took over many natural areas that were important for wildlife
C. Machines took away jobs commonly performed by farm workers
D. Machines diminished the quality of the crops.
The correct answer is B. Modern technology allowed for larger expanses of land to become cultivated, so farming took over many natural areas that were important for wildlife.
Explanation:
In the last decades, the creation of agricultural technology has increased the efficiency of growing crops. This means now, all the process is more efficient, which leads to more products to be sold and an increase in profit. However, the possibility of large scale agriculture has caused more land is used for this purpose. This often implies natural ecosystems such as forests are destroyed and the land of these ecosystems, which is usually rich in minerals, is used for extensive agriculture. This is a negative consequence of agricultural technology as natural areas important for wildlife are taken for human profit.
Answer:
B
Explanation:
Penn Foster
Genral Science
Page 14
Which of these statements best sums up evolution?
rapid change in species’ habits and features
rapid development of vestigial structures in a species
change in a population through new species being made
change in a population through genetic variation over time
Answer:
change in a population through genetic variation over time
Explanation:
took the test
Classify the following organisms into their respective kingdoms (i) Yeast (ii) Penicillium (iii) Rhizobium (iv) Mushroom (v) Amoeba (vi) fish
Answer:
(i) Yeast- Kingdom Fungi
(ii) Penicillium- Kingdom Fungi
(iii) Rhizobium- Kingdom Eubacteria
(iv) Mushroom- Kingdom Fungi
(v) Amoeba- Kingdom Protista
(vi) fish- Kingdom Animalia
Explanation:
Living organisms were classified into a large group called KINGDOM, which represent the largest and most generic grouping consisting of organisms that share a few similarities. The kingdoms that living organisms were classified into are as follows: Plantae, Animalia, Fungi, Protista, Eubacteria, Archaebacteria, etc.
Based on the question, the mentioned organisms are classified into the following kingdoms:
(I) Yeast: Yeast is a unicellular microbe classified under the Kingdom Fungi due to possession of chitin in its cell wall and other similar features with members of kingdom Fungi.
ii) Penicillium- Penicillium is a genus classified under the Kingdom Fungi.
(iii) Rhizobium- Rhizobium is a genus of prokaryotic organism (lack membrane-bound nucleus and organnelles) classified under the Kingdom Eubacteria.
(iv) Mushroom- Mushrooms are saprophytic (heterotrophic) species of organisms classified under the Kingdom Fungi.
(v) Amoeba- Amoeba is a genus of unicellular eukaryotes classified under the Kingdom Protista.
(vi) fish- Fishes are organisms classified under the Kingdom Animalia
Several statements related to the process of cellular respiration are listed. Classify each statement as true or false.
Answer:
option 1, 2, 4, and 5 are true while 3 is false.
Explanation:
statements are given below.
1) Anaerobic respiration occurs by either lactic acid or alcohol fermentation.
2) Glycolysis is the first step in anaerobic respiration only.
3) only anaerobic respiration produces a net gain of ATP.
4) anaerobic respiration occurs in the cells cytoplasm.
5) aerobic respiration always include the citric acid cycle.
Anaerobic respiration occurs by either lactic acid or alcohol fermentation and produces very low amount of ATP due to the absence of oxygen. Glycolysis refers to the breakdown of glucose molecule in pyruvate and ATP molecules. It only occurs in anaerobic respiration because it does not requires oxygen. Both aerobic and anaerobic respiration produces energy in the form of ATP. Aerobic respiration occurs in the mitochondria of the cell while anaerobic respiration occurs in the cytoplasm. Citric acid cycle is main part of aerobic respiration.
2. Exocrine glands, such as sweat glands, secrete fluids
glands secrete hormones directly into the bloodstrea
3. The _______ gland plays an important role in puberty
4. Epinephrine, triggering the "fight or flight" response
glands, which sit on top of the kidneys.
5. Most glands that secrete hormones operate using fe
When hormone concentrations are high, the gland w
the hormone.
6. Many cells produce chemicals called_____ hormon
impact inflammation and reproduction.
7. The gland that helps regulate growth, body temperat
lod the
Answer:
pituitary gland
Prostaglandins
oestrogen and testosterone
Explanation:
The pituitary gland plays an important role in puberty. Puberty refers to the time in which a boy or girl sexually mature. Many cells produce chemicals called Prostaglandins hormone which impact inflammation and oestrogen and testosterone are the hormones which is responsible for the maturation of eggs in female and sperm in male. these hormones plays a vital role in the growth and development of human body.
Answer:
1.Hormones
2. endocrine
3. pituitary
4. adrenal
5. less
6. prostaglandins
7. thyroid
8. Steroidal hormones enter the cell directly and interact with DNA inside the nucleus. These hormones change gene expression, affecting the RNA that is produced and the proteins that are translated in a cell. Nonsteroid hormones do not enter the cell. Instead, they bind to specific receptors on the outside of the cell membrane. This triggers molecules called secondary messengers, such as cAMP, to begin their work of relaying information in the cell, where other chemicals, messengers, and proteins are involved to create a cellular response.
Explanation:
Penn Foster
The possibility of magnifying contaminating sequences present in a nucleic acid pool is a drawback associated with PCRs high level of sensitivity (i.e., potential for exponential amplification).
A. True
B. False
Answer:
True
Explanation:
The Polymerase Chain reaction (PCR) is a technique widely used in molecular biology to identify specific DNA fragments generally in a size range of 100 to 1000 base pairs (bp). PCR sensitivity refers to the potential of the PCR technique to specifically amplify the desired sequence in the sample. PCR is a highly sensitive (and also specific) method with values around 100% if the experimental conditions are proper. However, to reach these values, it is imperative to work in optimal conditions by eliminating contaminant factors in the sample which may alter PCR amplification.
HELP ASAP DUE NOW PLSSS HELP 10 points and brainlist Which arrows show matter moving from a producer to an omnivore? Select all that apply.
Answer:
my best guess is number answer 2 and answer 4
because crows love to eat desert woodrats and for the last one i watched it in national geo, its like a cycle grass hopper died by a mouse dies by a rattle snake.
In 1998, paleoanthropologist Rick Potts published an article in The Yearbook of Physical Anthropology, a peer-reviewed journal. The article was titled “Environmental Hypotheses of Hominin Evolution.” In his paper, Potts claimed that great variations in environmental conditions over time were responsible for the adaptability of humans and the success of our species. Which would most likely be found in his paper?
This question is incomplete because the options are missing; here is the missing section:
Which would most likely be found in his paper?
A. A review of modern human anatomical structure.
B. Evidence of changing environmental conditions, with references.
C. The reasons competing hypotheses are wrong.
D. His opinion of what will happen to the survival of the human race.
The answer to this question is B. Evidence of changing environmental conditions, with references.
Explanation:
In texts such as scientific articles, the central point is expressed by the main claim or hypothesis as this is supported and explained through evidence in the articles. This means Potts article focuses on the environmental changes and how these contributed to the human species adaptability.
Due to this, it is expected the article explains the changes in environmental conditions, and the connection of these to adaptability. Moreover, because this is a scientific article all ideas should be supported with evidence collected by the author including references to other reliable sources. Thus, "evidence of changing environmental conditions, with references" is expected to be found in this article.
Answer: B
Explanation: I took the test :)
The type of teeth seen in blank are usually broad and flat
Answer:
MolarsExplanation:
Molars are the teeth furthest back in our mouth. Their broad, flat surfaces help grind food as we eat...
hope this answer correct :)
Match the following.
____________ Auditory area.
____________Primary somatosensory cortex.
____________Primary (somatic) motor cortex.
____________Motor speech (Broca's) area.
____________Premotor cortex.
____________Visual area.
____________Gustatory (taste) area.
____________Seat of intelligence, abstract
a. Frontal lobe
b. Parietal lobe
c. Insula
d. Occipital lobe
e. Temporal lobe
Answer: Please see the explanation column for answers
Explanation: Matching the following, we have
Auditory area------ Temporal lobe
Primary somatosensory cortex-----Parietal lobe
Primary (somatic) motor cortex.------Frontal lobe
Motor speech (Broca's) area-------Frontal lobe
Premotor cortex.------Frontal lobe
Visual area--------Occipital lobe
Gustatory (taste) area------Insula
Seat of intelligence, abstract------Frontal lobe
Identify the type of system used for mass production. Tommy owns a toy factory and uses a in which all the machines and workers at workstations process each manufactured item in the same order. This system is suitable for mass production.
Question
Select the correct answer.
Which of the following conditions would likely lead to the slowest rate of weathering?
a dry, temperate region with few hills or valleys
a steep mountain in a region with a cold climate
a hilly region that receives heavy, acidic precipitation
a region with heavy rainfall, where temperatures vary greatly
Submit
The condition above which would likely lead to the slowest rate of weathering is region with heavy rainfall, where temperatures vary greatly.
What is weathering?Weathering simply refers to the deterioration of rocks, soils and minerals substances through contact with water or even biological organisms.
So therefore, the condition above which would likely lead to the slowest rate of weathering is region with heavy rainfall, where temperatures vary greatly
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Answer:
A dry temperate region with few hills or valleys
Explanation:
this is right on plato
Which of the following is not considered a transformative change?
1) cracking down on illegal logging and fishing
2) curbing wasteful consumption
3) burning more fossil fuels
4) slimming agricultural environmental footprint
Answer:
3) burning more fossil fuels
Explanation:
Transformative changes are defined as the practical or strategic process that leads to revolutionary changes in the environment.
Transformative changes have a positive impact on the environment and society.
All the given options are revolutionary changes along with positive impact on the environment except burning of fossil fuel. Burning of fossil fuel causes pollution and leads to global warming which is harmful for environment.
Hence, the correct option is 3) burning more fossil fuels.
A Maximum-Minimum thermometer has two stems which record the highest and lowest temperatures during a period of time. A small metallic piece in each stem indicates the temperature. A. 55o C, 35o C, 45o C B. 45o C, 25o C, 35o C C. 55o C, 25o C, 35o C D. 45o C, 25o C, 30o C 4. M
Answer:
The correct option is A: 55° C, 35° C, 45° C
Explanation:
The Six's thermometer is a device to record maximum and minimum values of temperature within a given period of time. It is a glass tube in a U shaped manner that contains mercury, which is dependent on the expansion of alcohol in order to register a maximum reading. It is made use of for the purpose of meteorology, horticulture etc.
The metallic piece in each stem indicates the temperature of 45°C, 25°C, 35°C. That is option B.
A maximum-minimum thermometer is an instrument used to measure both the minimum and maximum temperature of a given area for a period of time.
The maximum-minimum thermometer is used in the following fields:
Horticulture: This is useful in the sustainable production of cultivated food and ornamental plants as temperature of the area in use needs to be monitored.Meteorology: This is useful in this field to monitor the temperature of different locations.The range for a maximum-minimum thermometer is -30°C to 50°C.
Therefore, the metallic piece in each stem will indicate the temperature of 45°C, 25°C, 35°C which is within the range.
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Hemoglobin is the blood protein responsible for the transport of oxygen. Carbon monoxide disturbs oxygen transport by
Answer:
Answered below
Explanation:
Hemoglobin is found in the red blood cells and is responsible for the transportation of oxygen from the lungs to the various body cells.
Oxygen binds to hemoglobin because it has a high affinity for it. This aids its transportation. When it gets to the cells it unbinds and get transported into the cell for use in energy production.
Carbon monoxide is an odourless, dangerous gas which has more affinity for hemoglobin than oxygen. Therefore when carbon monoxide is inhaled, it quickly binds to hemoglobin, thereby displacing oxygen. It binds to hemoglobin for a longer period and due to this, the body does not get any oxygen and cells begin to die.
Symptoms of carbon monoxide poisoning include dizziness, headaches, fatigue and coma.
In the process of urine formation:_____.
a. first filtrate is formed, then tubular fluid, then urine.
b. tubular fluid is formed, then filtrate, then urine.
Answer:
b i think is your answer
Explanation:
how many lactobacillyus present in 1 lire of curd packet
A genus of gram-positive, microaerophilic, rod-shaped bacteria occurring widely in nature. Its species are also part of the many normal flora of the mouth, intestinal tract, and vagina of many mammals, including humans. Pathogenicity from this genus is rare.
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A teenager throws a 7.26 kg rock into a lake, trying to make a big splash. If the rock is travelling at a speed of 7.5 m/s, how much kinetic energy does the rock have?
Explanation:
K.E = 1/2mv²
1/2 x 7.26 x 7.5²= 204.19j
why does earths gravity pull us to the ground
Answer:
Earth is like a magnet, except the atmosphere is the force that pulls us down
Explanation:
CH 7 What will be the effect if a
toxin make a pore ( o ) in the
inner membrane of the
mitochondria
Answer:
Mitochondria is known as the powerhouse of the cell as it provides energy to the cell for performing different functions.
If a toxin causes pore in the inner membrane of the mitochondria and increases the permeability of the mitochondrial membranes. The permeability of mitochondrial membranes leads to mitochondrial swelling and causes cell death through necrosis and apoptosis.
Briefly explain what was done in the experiment where pigeons could choose which button to peck in the Skinner box. How does this relate to self-control?
In this experiment, Skinner placed a pigeon inside a box that contained a button that when pressed released water or food. This pigeon went through periods of deprivation of water and food, but over time, he realized that when he pecked the button he had access to these two elements. Skinner called this behavior operant behavior, which is the behavior that occurs controlled by its consequences.
Although Skinner did not specifically study self-control, with this experiment, we can make a connection between operant behavior and self-control, since both are behaviors shown as a way to change the environment in which they are inserted, but this change also affects them.