Question

1. The nucleic acid synthesis takes place in a)3’-5’ direction b)5’-3’ directionc)Both ways d)Any direction 2. What is the nature of the strands of the DNA duplex? a)Anti-parallel and complementary b)Identical and complementary c)Anti=parallel and non-complementary d)Dissimilar and non-complementary 4. AUG stands for a)Alanine b)Methionine c)N-formyl methionine d)Glycine 5. The reason behind the anti-parallel strand of DNA is a)Hydrogen bond b)Ionic bond c)Phosphodiester bond d)Disulphide bond 6.Select the incorrectly matched pairs a)Purines – Nitrogenous bases cytosine, thymine and uracil b)Recombinant DNA – DNA formed by joining the DNA segments from two different sources c)r-RNA – RNA found in ribosomes d)ATP – The energy carrying compound in the cell 7.The energy source for the elongation process is a)Creatine-PO4 b)GTP c)ATP d)All of the above 8.In lac-operon, which protein is not regulated by the repressor? a)Galactosidase b)Lactose Permease c)Tryptophan d)Transacetylase 9. Which enzyme is not produced during lactose catabolism by E.coli? a)Ꞵ-galactosidase b)Lactose Permease c)Thiogalactoside transacetylase d)Lactose dehydrogenase 10.A molecule that acts as a genetic material must fulfil the following traits, except a)It should be structurally and chemically unstable b)It should have the ability to generate its replica c)It should facilitate slow changes necessary for evolution. d)It should be able to express itself in the form of Mendelian characters.

Answer 1

Answer:

1. 5’-3’ direction
2. Anti-parallel and complementary
3. Alanine
4. Hydrogen bond
5. Purines – Nitrogenous bases cytosine, thymine and uracil

Answer 2

1. 5’-3’ direction

2. Anti-parallel and complementary

3. NO QUESTION

4.  Methionine

5. Phosphodiester bond

6. Purines – Nitrogenous bases cytosine, thymine and uracil

7. GTP

8. Tryptophan

9. Lactose dehydrogenase

10. It should be structurally and chemically unstable

The Genes are the unit of heredity. These are present in the chromosomes that which make up to the DNA. the DNA contains all genetic information that which is passed on the from one generation to another. This forms the molecular basis of inheritance.

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