Structure of DNA

Q.

The number of base pairs present in one turn of DNA is

1. 10

2. 9

3. 11

4. 12

Q. In the DNA molecule:

1. the proportion of adenine in relation to thymine varies with the organism
2. there are two strands which run antiparallel one in 5' $\to$ 3' direction and other in 3' $\to$ 5'
3. the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
4. there are two strands which run parallel in the 5' $\to$ 3' direction

Q. If DNA has 45, 000 base pairs, how many complete turns will the DNA molecule take?

Q.

What is the meaning of polarity of DNA?

1. DNA is positively charged on one end and negatively charged on others.

2. One strand of DNA is positively charged while other is negatively charged.

3. DNA has two distrinct ends, one is called 3' -end and other 5' -end.

4. None of the above

Q. If a length of DNA has 45, 000 base pairs, how many complete turns will the DNA molecule take?

1. 4500
2. 45000
3. 45
4. 450

Q. The number of glycosidic bonds associated with the DNA of haploid human cells are

Q. If a linear double stranded DNA with 1000 base pairs have A = 15%, then find out total number of hydrogen bonds in between the two strands of this DNA?

1. $6000$
2. $600$
3. $2700$
4. $2100$