NUCLEIC ACIDS / GENETICS MATERIALS

NUCLEIC ACIDS/GENETIC MATERIAL

1. Who identified nuclei as DNA?

a. Miescher b. Zacharis c. Levene d. Kornberg

2. Term nucleic acid was given by

a. Altmann b. Miescher c. Khorana d. Behren

3. How many nucleotides are found in one spiral of DNA?

a. 5 b. 10 c. 20 d. 25

4. If DNA has 10spirals, the length of DNA will be

a. 34Å b. 340Å c. 640 Å d. 64Å

5. What would be the length of DNA containing 10000 base pairs?

a. 68000 Å b. 34000 Å c. 10000 Å d. 1 m

6. Nucleotide is

a. Base — sugar — OH b. (base — sugar — phosphate)n

c. Base — sugar — phosphate d. Sugar — Phosphate

7. DNA was discovered by

a. Miescher b. Altman c. Watson d. Wilkins

8. DNA is found in

a. Chloroplast b. Mitochondria c. Nucleus d. All of these

9. Who gave the chemistry of DNA and proved that in DNA there are 4 types of nucleotides?

a. Kossel b. Levene c. Chargaff d. Zacharis

10. The smallest type of RNA is

a. t RNA b. m RNA c. rNA d. Genetic RNA

11. The type of RNA responsible for proper sequence of amino acids in protein synthesis is

a. r RNA b. tRNA c. mRNA d. hnRNA

12. DNA is genetic material was proved by

a. Watson & Crick b. Hershey & chase c. Griffith d. Sutton & Boveri

13. Sum of all the genes in a population is called

a. gnotype b. genepool c. genelibrary d. genome

14. Which can be an initiation codon/s

a. AUG b. GUG c. Both a & b d. Only AUG

15. Which was first triplet codon discovered?

a. AAA b. UUU c. CCC d. GGG

16. If sequence of bases on a sense strand of DNA is CATTAGCAC, what will be the sequence on

its complementary RNA

a. GTAATCGTG b. GUAAUCGUG c. CAUUAGCAC d. None of these

17. Transcription is

a. DNA synthesis b. RNA synthesis c. Protein synthesis d. Ribosome synthesis

18. Genetic code was cracked (deciphered) by

a. Watxon and Crick b. Beadle and Tatum c. Gamov

d. Nirenberg, Mathaei and Khorana

19. RNA controls synthesis of

a. Amino acids b. Nucleotides c. Chromosomes d. Enzymes

20. All the nonsense codons start with the nucleotide having

a. Adenine b. Guanine c. Cytosine d. Uracil


ANSWERS

1. b 2. a 3. c 4. b 5. b 6. c 7. a 8. d 9. b 10. a

11. c 12. b 13. b 14. a 15. c 16. b 17. b 18. b 19. d 20. d