1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ANTONII [103]
3 years ago
8

The cells of certain eukaryotic organisms, such as vertebrates and plants, often methylate the cytosines in their DNA, producing

5‑methylcytosine. Organisms that perform cytosine methylation also have evolved a specialized DNA repair system that recognizes G−TG−T base pair mismatches and then repairs the G−TG−T mismatches to form G≡TG≡T base pairs. What is the advantage of a DNA repair system that corrects all G−TG−T mismatches to G≡CG≡C base pairs instead of A=TA=T base pairs when 5‑methylcytosine occurs in the genome?
Biology
1 answer:
stich3 [128]3 years ago
6 0

Answer:

The G-T mismatches generally originate because of the spontaneous deamination of 5-methylcytosine to thymine. Therefore, correcting G-T to G≡C most probably preserves the original sequence.  

In the DNA, the 5-methylcytosine usually goes through the process of deamination to thymine. This transformation may cause a G-T base pair or mismatch of nucleotide pairs. Generally, the mutation like C-T transition is common. The G-T base pair is identified by base excision repair proteins, which withdraws this mismatched base pair.  

The repair system encourages methylation of cytosine as the mechanism of the regulation of transcription, which permits the turning off or on the process of transcription on the basis of the requirement of the cells. This also assists in preventing the mutation of DNA.  

You might be interested in
The plant on the left is the parent plant. the plant on the right is the parent's offspring. the offspring is genetically identi
Aloiza [94]
The parent plant produced asexually because offspring from asexual reproduction are genetically identical to the parent.
7 0
3 years ago
Which pair shows the chromosome numbers in human cells both before and after meiosis?
VladimirAG [237]
Each chromosome has 46 in mitosis whereas meiosis has 23 pairs from each gametes (egg cells and sperm) from the parents which are called daughter cells so the answer is 23 and 23 one from the mother and the other from the father
4 0
3 years ago
What would be the main problem with reproduction if meiosis did not take place to form sex cells?
shtirl [24]
Answer - <span>Fertilization would result in a zygote with twice as many chromosomes as the parents.

Reasoning - Without Proper stable form of stages it would double and the cells wont be able to survive in the next generation.</span>

5 0
3 years ago
Read 2 more answers
Which organelle has a large amount of surface area
S_A_V [24]

Answer:

it can be mitochondrion or ser

3 0
3 years ago
Read 2 more answers
6.Explain how animals in Vertebrata are classified into further subgroups.​
tiny-mole [99]

Answer:

Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals

5 0
3 years ago
Other questions:
  • Complete the following analogy. Chromosome is to tree as gene is to .
    7·1 answer
  • The nurse is preparing to insert an iv for a client with dehydration. which dressing supply will the nurse gather to take in the
    15·1 answer
  • A prediction is forecasting what will happen using what
    7·1 answer
  • When a school of fish spawns, the males and females release sperm and eggs into the water. A sperm and egg cell unite to form th
    5·1 answer
  • Select all the factors that you know from the material presented in this lesson that are true of sickle cell anemia
    5·1 answer
  • How did planetesimals form?
    9·1 answer
  • Why are dichotomous keys used?
    8·2 answers
  • Four elements are shown as they appear in the periodic table 21 SC 44.956 Scandium 22 24 V Cr 47.867 50.942 51.996 Titanium Vana
    15·1 answer
  • Please define the terms, don’t copy and paste. I’m giving 15 points for it
    15·1 answer
  • Calculate the magnification of an object with length 4cm , if the length of the drawing is 40cm
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!