What kinds of point mutations alter a gene's DNA sequence?Describe each of them.

Answers

Answer 1
At the DNA level, there are two main types of point mutational changes: base substitutions and base additions or deletions. Base substitutions are those mutations in which one base pair substitutes for another. They, again, can be divided into two subcategories: transitions and transversions.

Related Questions

the lysis of red blood cells in blood agar is indicative of the presence of which enzymes?

Answers

 cause of hemolysis is the action of hemolysins, toxins that are produced by certain pathogenic bacteria or fungi. Another cause is intense physical exercise. Hemolysins damage the red blood cell's cytoplasmic membrane, causing lysis and eventually cell death.

Explanation: One cause of hemolysis is the action of hemolysins, toxins that are produced by certain pathogenic bacteria or fungi. Another cause is intense physical exercise. Hemolysins damage the red blood cell's cytoplasmic membrane, causing lysis and eventually cell death.

BAP assesses an organism's ability to produce hemolysins, enzymes that damage/lyse red blood cells (erythrocytes). The degree of hemolysis caused by these hemolysins aids in the identification of members of the genera Staphylococcus, Streptococcus, and Enterococcus.

What hemolytic pattern does S aureus shows on BAP?

On blood agar plates, colonies of Staphylococcus aureus are often encircled by zones of clear beta-hemolysis. The golden appearance of colonies of some strains is the etymological root of the bacteria's name; aureus meaning "golden" in Latin.

The action of hemolysins, toxins produced by certain pathogenic bacteria or fungi, causes hemolysis. Intense physical activity is another cause. Hemolysins cause lysis and eventually cell death by damaging the cytoplasmic membrane of red blood cells.

The action of hemolysins, toxins produced by certain pathogenic bacteria or fungi, is one cause of hemolysis. Intense physical activity is another cause.

Thus, Hemolysins cause lysis and eventually cell death by damaging the cytoplasmic membrane of red blood cells.

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Explain how products produced by photosynthesis relate to those used by respiration.​

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Answer:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

Explanation:

How can you tell, when you look at a cross section of a young stem, whether it is a dicot or a monocot?​

Answers

Answer:

Monocot and dicot stems differ in the arrangement of their vascular system

All stems have nodes, internodes, and axillary buds; these features distinguish them from roots and leaves, which do not have them.

Hope this is helpful

what
term can be used to describe the organizational level of the brain in the human body?

Answers

Answer:

The brain has three main parts: the cerebrum, cerebellum, and brainstem

Explanation:

Cerebrum: is the largest part of the brain and is composed of the right and left hemispheres. The  Cerebellum is located under the cerebrum. Its function is to coordinate muscle movements, maintain posture, and balance.

Can somebody help me?

Answers

Answer:

a

Explanation:

How are solar cells used today?

Answers

Answer:The most commonly used solar technologies for homes and businesses are solar photovoltaics for electricity, passive solar design for space heating and cooling, and solar water heating.

Explanation: Solar cells can be arranged into large groupings called arrays. ... These arrays, composed of many thousands of individual cells, can function as central electric power stations, converting sunlight into electrical energy for distribution to industrial, commercial, and residential users.

In this graph, what are the independent and dependent variables?

Answers

Answer:

Wing beats are independent and the mass of hummingbird are dependent.

Explanation:

Because the y-intersept is independent and the x-intersept is dependent.

Brainliest please!

Which form of heat transfer takes place when you touch a hot stonea. convectionb. subductionc. conductiond. radiation

Answers

It should be the radiation
it should be radiation if i’m correct

Answer this please
fastest answer gets brainliest!!

Answers

Answer:

Photosynthesis is a process that plants go through to make their food. They gather carbon dioxide and nutrients through their roots such as water. they make sugar with it.

Explanation:

hope it helps. look it up.

I need help with this

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Answer:

could you please post a bigger picture of that so i can see the questions

Explanation:

is the blood glucose level an example of osmoregulation

Answers

Answer:          yes it is I think

Explanation:

What features are present in both a plant cell and bacterial cell

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Answer:

organelles , Plasma membrane, cytoplasm, ribosomes

Explanation:

mark brainliest plz

If two glasses of water are at the same temperature, the average kinetic energy of the particles of water in each glass is the same.True orFalse

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Answer:

True

Explanation:

Temperature is the measure of average kinetic energy of objects, in this case it is water in a glass. If both temperatures are the same, then both average kinetic energies are the same.

What happens to a population when emigration decreases?

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Answer:

Emigration decreases the population. the answer is B

Explanation:

If the immigration decreases they have no food they they will die out.

How long can fingerprints stay on plastic if stored correctly?

Answers

Answer:

over 7 yrs...............

Which structure is the statement below most likely referring to?
A large glucose molecule requires facilitated diffusion, but
an oxygen molecule does not.
A. A permeable membrane
B. A semipermeable membrane
C. A cell wall
ОО
D. A chloroplast
SUBMIT
Science

Answers

Answer is B: A semipermeable membrane

which type of transport would be required for the solute molecules to move against the concetration gradient?

Answers

Answer:

Active Transport

Explanation:

active transport

During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

the only way to tell if the red blood cells are crenated is to

Answers

Answer:

is to go for medical check-up

Explanation:

it's through the medical checkup

you will know that it still crenated

The only way to tell if the red blood cells are crenated is to observe them under a microscope

What is crenation?

Crenation is the process of red blood cells becoming misshapen and breaking apart, and this can be seen through the examination of red blood cells under a microscope.

By observing the shape of the red blood cells, it can be determined if they are crenated or not. Additionally, other methods such as hemoglobin analysis or measuring the osmotic fragility of the red blood cells can also be used to determine if crenation has occurred.

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Which of the following correctly orders events during mitosis?
The nuclear membrane dissolves. The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes.
The nuclear membrane dissolves. The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes.

The nuclear membrane dissolves. Microtubules organize the chromosomes. The mitotic spindle attaches to chromosomes.
The nuclear membrane dissolves. Microtubules organize the chromosomes. The mitotic spindle attaches to chromosomes.

Microtubules organize the chromosomes. The nuclear membrane dissolves. The mitotic spindle attaches to chromosomes.
Microtubules organize the chromosomes. The nuclear membrane dissolves. The mitotic spindle attaches to chromosomes.

The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes. The nuclear membrane dissolves.

Answers

The answer option which correctly orders events during mitosis is:

D. The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes. The nuclear membrane dissolves.

Mitosis can be defined as a type of cell division or duplication through which a single parent cell produces two (2) genetically identical daughter cells.

During mitotic division, the two (2) genetically identical daughter cells produced by a single parent cell usually have the same number of chromosomes as their parent cell; this process is referred to as duplication division.

Furthermore, the following events take place during mitotic division in living organisms:

The mitotic spindle (spindle fibers) of microtubules attaches to chromosomes. These microtubules organize the chromosomes. The nuclear membrane dissolves.

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Answer:

The last one

Explanation:

The mitotic spindle attaches to chromosomes. Microtubules organize the chromosomes. The nuclear membrane dissolves.

which scientist stated that all animals are made of cells?

Answers

Ehehe brainschell needshh me omskrtt

Answer:

Theodor Schwann

Explanation:

Brainliest would be appreciated!!

which condition can cause a forward tilt of the pelvis and an increased curvature of the lower back?

Answers

Answer:

Tight hip flexor muscles

____________
When an enzymes breaks down or change shape

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Answer:

An enzyme’s shape is tied to its function. Heat, disease, or harsh chemical conditions can damage enzymes and change their shape. When this happens, an enzyme doesn’t work anymore. This affects the body processes the enzyme helped support.

Explanation:

Hope this helps :)

which statement about mitosis and cytokinesis is true?

Answers

Answer:

At the end of cytokinesis there are two daughter cells with a normal complement of diploid genetic material.

Explanation:

hope this helps you if it does please mark brainiest

haw many asteroids have been fount.?

Answers

Answer:

As of 29 October 2018, the LINEAR system alone has discovered 147,132 asteroids. Among all the surveys, 19,266 near-Earth asteroids have been discovered including almost 900 more than 1 km (0.6 mi) in diameter. in 2021 it's 400,000

Explanation:

hope it helps :P

Somebody help me please

Answers

Answer:unsaturated

Explanation: srry if I'm wrong

what would happen to the variation between organisms in a population if their dna polymerase did not have a proofreading function?

Answers

Answer:

What would happen to the variation between organisms in a population if their DNA polymerases did not have a proofreading function? ... It unwinds DNA.

Explanation:

which organelle produces food through photosynthesis?

Answers

Answer:

choloroplast

Explanation:

chloroplasts contain chloropyll, the green pigment that absorbs sun energy, therefore its the organelle responsible for photosynthesis

what is the approximate size of the chloroplast genome in base pairs?

Answers

Answer:

between 115 and 165 Kb

Explanation:

What is the main function of our nervous

Answers

Answer:

to collect a multitude of sensory information; process, interpret, and integrate that information;and initiate appropriate responses throughout the body.

the __________ girdle attaches the upper limb to the axial skeleton.

Answers

Answer:

pectoral

Explanation:

Each upper limb is connected to the axial skeleton by the pectoral girdle, which is made up of the clavicle and the scapula.

What is axial skeleton?

The clavicles and scapulae make up the pectoral or shoulder girdle. The upper limb bones are joined to the axial skeleton by the shoulder girdle. Additionally, the muscles that move the shoulders and upper limbs join to these bones.

Your upper limbs are attached to the bones along your body's axis by a pectoral girdle, also known as the shoulder girdle. Your body contains two pectoral girdles.

Therefore, the clavicle and collarbone, which together make up your shoulder, make up the pectoral girdle.

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