AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ends of the linear chromosomes are maintained by
A
helicase
B
primase
C
DNA pol
D
telomerase
Explanation: 

Detailed explanation-1: -The ends of linear chromosomes, called telomeres, protect genes from getting deleted as cells continue to divide. The telomerase enzyme attaches to the end of the chromosome; complementary bases to the RNA template are added on the 3′ end of the DNA strand.

Detailed explanation-2: -Telomeres, protein-DNA complexes at the ends of eukaryotic linear chromosomes, are essential for genome stability.

Detailed explanation-3: -Telomerase? is an enzyme? that adds the TTAGGG telomere sequence to the ends of chromosomes. Telomerase is only found in very low concentrations in our somatic cells?. Because these cells do not regularly use telomerase they age leading to a reduction in normal function. The result of ageing cells, is an ageing body.

There is 1 question to complete.