How many of the following were the features of the Human Genome

1. 99.9% bases are present are exactly same in all humans

2. all sequences were found to be coding sequences

3. Repeated sequences make up very large portion of the human genome

4. Repeated sequences are useful for chromosome structure, dynamics and evolution

5. The maximum no of genes were found to be present at the chromosome which was last sequenced

6. The fewest no of genes were found to be present at the chromosome which is present in male only.

(1) 1

(2) 2

(3) 3

(4) 5

The locations in human genome which differ by a single base difference is known as

(1)Single nucleotide mutation

(2)Single nucleotide polymorphism

(3)RFLP

(4)Single nucleotide polymorphogenesis

The largest known human gene is

(1) Dystrophin protein gene on X chromosome

(2) Sry gene on Y chromosome

(3) Dystropin protein gene on Y chromosome

(4) Sry gene on X chromosome

If an E.coli with heavy DNA allow to grow for 80 minutes in a culture medium of 14 NH 4

Cl, then what would be the proportion of heavy,light and hybrid densities DNA molecule

respectively?

1. 1/16 : 1/16 : 14/16

2. 0/16 : 14/16 : 2/16

3. 1/16 : 14/16 : 1/16

4. 1/8 : 2/8 : 6/8

Alec Jeffrey’s name is associated with

a. DNA sequencing

b. DNA fingerprinting

c. RNA sequencing

d. Gene cloning

Which of the following RNA polymerase catalyses the formation of transfer RNA in eukaryotes?

(1) RNA polymerase I                        

(2) RNA polymerase II

(3) RNA polymerase I and II              

(4) RNA polymerase III

Out of 64 codons how many of them code for amino acids?

(1) 64                            

(2) 20                            

(3) 61                            

(4) 32

Circular DNA is found in:
(1) Viruses

(2) Bacteria, chloroplast and mitochondria

(3) Chloroplast and mitochondria alone

(4) All of these

If in a DNA molecule cytosine is 18%, the percentage of adenine would be:

(a) 18%                (b) 32%                (c) 36%                (d) 64%

Isotopes used in proving semiconservative replication of DNA were:

(1) ¹⁴N ¹⁴C            

(2) ¹⁴N ¹⁵N            

(3) ¹⁴N ³¹P             

(4) ¹⁴C ³¹P