B. element identities of atoms in reactants
C. total number of electrons in reactants
D. chemical bonds between atoms in reactants
B. Mismatch repair
C. Direct repair by methyltransferases
D. Nucleotide excision repair
Answer:
The correct answer is B. Mismatch repair
Explanation:
Mismatch repair pathway recognizes the mismatched base pair that incorporated during DNA replication and then excise that incorrect base. After excision, it repairs the DNA.
The mismatched daughter strand is distinguished from the parent strand by mismatch repair system as the parent strand is methylated at some bases but the daughter strand is not methylated.
Three proteins help in mismatch repair MutH, MutL, MutS. Mut H and Mut S recognize the mismatch, Mut H excise the unmethylated strand from 5' side. Then helicase and exonuclease enzymes clave the segment from cleavage site to beyond the mismatch base.
The gap created by this action is filled by DNA polymerase and sealed by enzyme DNA ligase.
The 'Mismatch repair' pathway corrects mistakes when an incorrect nucleotide has been incorporated into a DNA sequence and DNA polymerase fails to recognize it. This pathway involves several proteins that recognize the error, excise the incorrect sequence, and re-synthesize the correct sequence.
When DNA polymerase fails to recognize that an incorrect nucleotide has been incorporated, resulting in a mismatch, the Mismatch repair pathway is in charge to correct this mistake. This system detects and repairs erroneous insertion, deletion, and mis-incorporation of bases that can arise during DNA replication and recombination, as well as repairing some forms of DNA damage. This process involves several proteins including MutS, MutL, and MutH. They recognize the error, excise the incorrect sequence and then re-synthesize the correct sequence using the original undamaged DNA strand as a template. The 'Mismatch repair' is a crucial mechanism to maintain the integrity of genetic information.
#SPJ11
b. physical model
c. computer model
d. none of the above
Answer: Option A Idea model
Explanation:
Where is highlighted group?
btw, you can calculate that by the number of group, it would be equal to that...
where is the highlighted group?
A diploid zygote, I hope this helps