Answer:
- This process is caused by spontaneous hydrolysis of a glycosidic bond: depurination and deamination
- This process is induced by ultraviolet light: pyrimidine dimer formation
- This can happen to guanine but not to cytosine: depurination
- This can happen to thymine but not to adenine: pyrimidine dimer formation
- This can happen to thymine but not to cytosine: none
- Repair involves a DNA glycosylase: deamination
- Repair involves an endonuclease: depurination, deamination and pyrimidine dimer formation
- Repair involves DNA ligase: depurination, deamination and pyrimidine dimer formation
- Repair depends on the existence of separate copies of the genetic information in the two strands of the double helix: depurination, deamination and pyrimidine dimer formation
- Repair depends on cleavage of both strands of the double helix: none
Explanation:
Depurination is the loss of purine bases (either adenine or guanine), while deamination refers to the removal of an amino group. During depurination, a β-N-glycosidic bond is cleaved by hydrolysis and a nucleic base is released (either adenine or guanine). All DNA bases may undergo deamination, except thymine (since thymine does not have an amino group). The ultraviolet (UV) radiation can cause thymine or cytosine to form dimers (e.g., pyrimidine dimers), being thymine dimers the most common lesion when DNA is exposed to UV light. Pyrimidine dimers may be repaired by different excision mechanisms, e.g., nucleotide excision repair, where the recognition of the DNA damage leads to the removal of the DNA fragment containing the lesion. DNA glycosylases are enzymes involved in the mechanism of base excision, these enzymes recognize and remove damaged bases by hydrolysis of the glycosidic bond, producing an abasic (apurinic and apyrimidinic) site. A DNA ligase enzyme covalently joins two DNA molecules by forming a phosphodiester bond, which is required during these processes.
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Chapter 18 Lab Homework
Homework
Blood type
Can safely receive:
Can safely donate to:
K
0+
A-
B+
AB
AB+
Answer:
bro u have to be smart its okfdievidguvqw
Explanation:
An organism’s scientific name consists of which TWO taxonomic groups? (Select the TWO correct answers).
Class
Domain
Genus
Species
Kingdom
Phylum
Order
Family
Answer:
Scientists use a two-name system called a Binomial Naming System. Scientists name animals and plants using the system that describes the genus and species of the organism. The first word is the genus and the second is the species
An organism’s scientific name consists of which two taxonomic groups, genus, and species. The correct options are c and d.
What are taxonomic groups?Taxonomic groups are the groups that contain different groups in which the organism are divided. These are arranged from higher to lower groups. The highest group is the kingdom.
Kingdoms are divides of the different organisms of the earth. Taxonomy is organizing different organisms in a line so, that it will be easy for their studying.
The two taxonomic groups that come in last are genus and species. Genus and species make the scientific name of the organism. The genus contains animals that are most similar to each other. Species are similar organisms, that can breed with each other.
Therefore, the correct options are c, Genus, and d, Species.
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#SPJ2
Which correctly describes sister chromatids? (1 point)
A. They make up the mitotic spindle within the cell.
B. They form during metaphase when DNA is being replicated.
C. They are the daughter cells that form during cell replication.
D. They are part of the lined-up chromosomes in mitosis.
Answer:
D
Explanation:
they are part of the lined-up chromosomes in mitosis
i just took the quick check
In conclusion, the statement 'they are part of the lined-up chromosomes in mitosis' CORRECTLY describes sister chromatids (Option D).
During the synthesis (S) phase of the cell cycle, each chromosome is replicated. These identical DNA molecules are called sister chromatids.In mitosis, sister chromatids are held together and line up at the equator plate of the cell during metaphase.During anaphase, sister chromatids (now called chromosomes) are separated and pulled towards opposite poles of the cell by the mitotic spindle.In conclusion, the statement 'they are part of the lined-up chromosomes in mitosis' CORRECTLY describes sister chromatids (Option D).
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Identify the organism from Kingdom Protista.
Answer:
Organisms in the Protista kingdom include amoebae, red algae, dinoflagellates, diatoms, euglena, and slime molds.
Explanation:
please help me! :) thank you!
WILL MARK BRAINLIEST!!
Answer:
the independant variable the amount of light on each plant
Explanation:
5. Look at the highlighted portion of the graph. Which of the following is the best explanation for what is occurring within the population during this time period? A. birthrate > death rate B. birthrate < death rate C. birthrate = death rate
Answer:
A. birthrate > death rate
Explanation:
I had this question and this was the right answer
Select the correct answer.
The difference in concentration of materials across a space is called the
A active transport
B temperature
C concentration gradient
D equilibrium
The Correct choice is C
The difference in concentration of materials across a space is called the Concentration gradient .
anybody know the answer for this question ? thank you
Answer:
i think its: have a nucleus, cytoplasm and cell membrane
Explanation:
srry if im wrong i only know if they have a nucleus or not in which they do
What did belt mean by “ I saw the handiwork…starting with the road itself”
Answer:unsure
Explanation:
unsure
What is the term used for population moving into an area ?
Answer: Immigration.
Explanation: Hope that helps I'm sure that this is right
Uranium is an element that is often used in nuclear power plants. Uranium atoms are very large, and the substance can be dangerous if it is not carefully contained.
Answer:
What is the volume of a sphere with a radius of 24 units? A. 92167 units O B, 230477 unite 3 O c. 18A324 units D. 13,8247 units
Explanation:
Identify the structures of skeletal muscle
Why do metals dissolve in acids?
Answer:
In water or acids, the metals trade places with hydrogen. The hydrogen escapes as a gas, and metal atoms, no longer attached to the object from which they came, dissolve in solution.
sorry if I'm wrong but I wrote this in my hw and it was right so ye
Cuando se indica el reposo
Answer:
what happened which is this language
which atom weighs the most
Answer:
ELEMENT = hyrdogen SYMBOL= H ATOMIC NUMBER= 1 ATOMIC WEIGHT = [1.00784, 1.00811]
count how many cells are are in this picture
Answer:
there is no picture there lol
Scientists claim that increased demand for almonds would have a negative environmental impact on California. Which observation, if any, would support this claim?
A. The almonds are exported to other states and countries and profits increase for California's almond industry.
B. The increased demand for almonds increases the freshwater consumption in California.
C. The additional CO₂ produced by the almond trees is released into the atmosphere.
D. The additional consumption of sunlight by the almond trees reduces the amount of energy input on the solar panels and therefore the amount of energy available to Californians.
Answer:
The main issues associated with almond milk production are water use and pesticide use, which may produce long lasting effects on the environment in drought-stricken California, where more than 80% of the world's almonds are grown
Explanation:
Which environmental factor would cause the greatest decrease in the number of species of plants and animals living in some of the lakes in the United States?
Global warming
Ozone destruction
Acid rain
Increase in dissolved oxygen levels
The basic building block of matter
Answer:
Scientists once thought the most fundamental building block of matter was a particle called the atom. Now we know that the atom is made of many smaller pieces, known as subatomic particles. Every atom contains a central core called the nucleus, made of particles called protons and neutrons.
please help me figure this out
You push on an object with an applied force. What is the "reaction" force to your push?
the object being pulled by Earth
the object moving forward
the object pushing back on you
the object being lifted up
Answer:
the object pushing back on you
Explanation:
i put b in my test and it was wrong
and did it again and got it right
According to Newton's third law of motion, forces always act in equal but opposite pairs. Another way of saying this is for every action, there is an equal but opposite reaction. This means that when you push on a wall, the wall pushes back on you with a force equal in strength to the force you exerted.
The answer would be:
The object pushing back on you.
Which characteristic best explains why lentic ecosystems are more responsive to seasonal changes than lotic ecosystems?
Photosynthetic organisms keep lentic ecosystems warmer during the winter season.
Lentic ecosystems are susceptible to temperature due to their low dissolved oxygen.
Lotic ecosystems have low nutrient levels, making them more sensitive to temperature.
Lentic ecosystems tend to have smaller volumes of water compared to lotic ecosystems.
Lentic ecosystems tend to have smaller volumes of water compared to Lotic ecosystems.
Lentic ecosystem consists of still (stagnant) volume of water and good examples include ponds,lakes, basins etc.
Lotic ecosystem , on the other hand consists of a flowing volume of water and examples include seas, oceans, rivers etc.
The Lentic ecosystem usually is usually still and is affected by seasonal changes as it contains smaller volume of water when compared to the Lotic ecosystem which has a high volume.
Seasonal changes such as summer or winter affects the Lentic system easily as the small volume of water gets heated up and frozen easily which encourages more evaporation and freezing respectively.
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Answer:
what he said^ but the answer is down here<_>
Explanation:
jk but he is right
Which statement describes Newton's first law of motion?
A. Objects only change motion when a nonzero net force acts on them.
B. Increasing the distance between objects decreases the gravitational force between them.
C. An object's acceleration is determined by the net force acting on it divided by the object's mass.
D. When one object pushes another, the second object pushes back with an equal force in the opposite direction.
When cells divide they make two ____ cells.
A- daughter
B- son
C- dad
D- mom
Answer:
A.) daughter cells
Explanation:
Nice pfp. <3
Answer:
the correct answer would actually be mom or parent cell
Explanation:
mitosis is a process of nuclear division in eukaryotic cell that occurs when a parent cell divides to produce two identical daughter cells during cell division mitosis refers specifically to the separation of the duplicated genetic material carried in the nucleus
What is dis yeyyeyeye
Drag the appropriate labels to their respective targets. Label processes on the right in PURPLE, and all other components on the left.
Starting from the top downward:
Group 1:
TranscriptionRNA processingTranslationGroup 2;
DNAPre-mRNAmRNARibosomePolypeptideThe entire setup represents what happens during gene expression. The process starts in the nucleus with genetic information in DNA being transcribed into mRNA.
The pre-mRNA undergoes some processing before being transported to the cytoplasm where it gets attached to the ribosome and utilized in the synthesis of polypeptides (also known as proteins) in a process known as translation.
More on gene expression can be found here: https://brainly.com/question/10706638
protons, neutrons and electrons in atoms determine the number of valence electrons determine the stability of the atom based on above
Answer:
atoms determine the number of valence electrons determine the stability of the atom based on reading the topography of the atmosphere
A good cancer medicine will stop cells from dividing out of control. What might be the side effects of this medicine? Explain your answer.
identify the parts of the heart in the corresponding spaces. once you have identified the parts of the heart, label the image provided
Answer:
no image provided to answer
Explanation:
Cuales son los seres vivos
Answer:
Living things move, respond to stimuli, reproduce and grow, respire, and are dependent on their environment. Most living things need food, water, light, temperatures within defined limits, and oxygen. ... Some non-living things, such as rocks and water, were never living.
Explanation:
Answer:
Propiedad o cualidad que distingue a los organismos vivos de los organismos muertos y la materia inanimada, que se manifiesta en funciones como el metabolismo, el crecimiento, la reproducción y la respuesta a estímulos o adaptación al medio que se origina en el interior del organismo.