7. Which of the following is a possible entire nucleotide found in a DNA molecule? (1 point)
• Adenine + phosphate group + thymine
• cytosine + phosphate group + guanine
• deoxyribose + phosphate group + polymerase
• deoxyribose + phosphate group + cytosine

Question

7.   Which of the following is a possible entire nucleotide found in a DNA molecule?  (1 point)	
•	Adenine + phosphate group + thymine
•	cytosine + phosphate group + guanine
•	deoxyribose + phosphate group + polymerase
•	deoxyribose + phosphate group + cytosine

abhisar · Answer

Hi!
What do you think it should be?

anonymous · Answer

i honestly have no clue

abhisar · Answer

A nucleotide is composed of a ribuse sugar+phosphate group and a nitrogenous base

anonymous · Answer

ok

abhisar · Answer

Ribose sugar is any one among deoxyribose or ribose but for DNA it is deoxyribose and for RNA it is ribose

abhisar · Answer

Nitrogenous base is any one among Adenine, Thymine, Guanine, Cytosil and uracil but note cytosil is present only in DNA and uracil is present only in RNA

abhisar · Answer

Can you select the correct option now?

anonymous · Answer

d?

abhisar · Answer

That's correct!

anonymous · Answer

alright! do u think u could help with a few more?

abhisar · Answer

I am not sure I can help with many of them as I have to go soon but I'll help you with one more c:

anonymous · Answer

alright thnx

anonymous · Answer

8.   How does replication of the lagging strand of DNA compare with replication of the leading strand?  (1 point)
•	The replication process is identical for both strands.
•	Okazaki fragments are made on the lagging strand but not on the leading strand.
•	The leading strand and the lagging strand are both copied in the same direction (either up or down the molecule)
•	DNA ligase works on the leading strand  while DNA polymerase works on the lagging strand

abhisar · Answer

What do you think?

abhisar · Answer

First of all we know that the replication process is not similar as they are replicated in opp direction. So you can eliminate which option?

anonymous · Answer

c

abhisar · Answer

Yes, and option a too. Right?

anonymous · Answer

yea

anonymous · Answer

i think it's d but im not sure

abhisar · Answer

DNA ligase is an enzyme which cuts the DNA while polymeraze is an enzyme which joins the DNA and is used in DNA replication for both strands

abhisar · Answer

So the only one left is formation of $\bf Okazaki~Fragments!!$
These are formed on the lagging strand but not on leading strand. Remember it

abhisar · Answer

See a detailed explanation here https://en.wikipedia.org/wiki/DNA_replication#Lagging_strand

anonymous · Answer

alright thank you so much for all your help!

abhisar · Answer

Pleasure was all mine c: