Heredity and genetics Free Solved practice paper

Heredity and genetics Free Solved practice paper
Heredity and genetics Sample Solved Questions
Free Practice test for Biology herdity and genetics
1. Which of the following is a biologically incompatible marriage?
(a) Rh+ man and Rh- woman
(b) Rh- man and Rh+ woman
(c) Rh+ man and Rh+ woman
(d) Rh- man and Rh- woman
Ans. (a)

2. Genetic information in a DNA is coded in the
(a) sequences of nucleotides
(b) base pairing
(c) proportion of each base
(d) coding sequence
Ans. (a)

3. For structure of nucleic acid, which of the following statements is wrong?
(a) DNA can be single stranded in some viruses
(b) RNA can be double stranded occasionally
(c) There are as many as 12 bases per turn in Z DNA
(d) The length of one helix is 45 Å in B DNA and in Z DNA
Ans. (d)

4. DNA strands are anti-parallel because of
(a) H-bonds
(b) phosphate diester bonds
(c) disulphide bonds
(d) peptide bonds
Ans. (a)

5. Duplication of DNA is called
(a) replication
(b) transduction
(c) transcription
(d) transduction
Ans. (a)

6. If the basis sequences of the strand of DNA is CAT TAG CAT CAT GAC what will be base sequence of complementary RNA strand?
(a) GTA ATG ATG GUA CUG
(b) TAG ATG GTA GAT GAT CTS
(c) GUA AUC GUA GUA CUG
(d) GTA ACC GAT GAT GAT CAT
Ans. (c)

7. DNA polymerase enzyme is required for the synthesis of
(a) RNA from DNA
(b) DNA from DNA
(c) RNA from RNA
(d) DNA from RNA
Ans. (b)

8. In DNA replication, the Okazaki fragments on the lagging strand are joined together by:
(a) DNA polymerase
(b) primase
(c) helicase
(d) DNA ligase
Ans. (d)

9. There are 64 codons in genetic code dictionary because
(a) there are 64 types of tRNA’s found in the cell
(b) there are 44 meaningless and 20 codons for amino acids
(c) genetic code is triplet
(d) there are 64 amino acids to be coded
Ans. (c)

10. Genetic code was discovered by
(a) Holley and Nirenberg
(b) Nirenberg and Matthei
(c) Holley Nirenberg and Khorana
(d) W. Fleming and Matthei
Ans. (b)

11. Initiation of polypeptide chain in protein synthesis is induced by
(a) methionine
(b) leucine
(c) lysine
(d) glycine
Ans. (a)

12. UAA, UAG and UGA are
(a) non overlapping codons
(b) non sense codons
(c) degenerate codons
(d) chain initiator codons
Ans. (b)


13. Because most of the amino acids are represented by more than one codons, the genetic code is said to be
(a) deaminated
(b) comma less
(c) degenerate
(d) overlapping
Ans. (c)

14. Gene controls
(a) protein synthesis but not heredity
(b) protein synthesis and heredity
(c) biochemical reaction of some enzymes
(d) heredity but not protein synthesis
Ans. (b)

15. Anticodon is associated with
(a) mRNA
(b) DNA
(c) tRNA
(d) rRNA
Ans. (c)

16. Nobel Prize to A. KORNBERG and S. OCHOA was given for
(a) artificial synthesis of DNA and RNA
(b) theory of natural selection
(c) mutation theory
(d) one gene one polypeptide chain theory
Ans. (a)

17. Of the following, which sequence is present in Rous Sarcoma Virus?
(a) DNA —>RNA —> proteins
(b) DNA —> DNA —> proteins
(c) RNA —> DNA —> proteins
(d) RNA —> DNA —> RNA—>proteins
Ans. (d)

18. Who coined the term gene?
(a) Mc Clintock
(b) Waldeyer
(c) Johannsen
(d) Mendel
Ans. (c)


19. The terms cistron, recon and muton were proposed by
(a) Bateson
(b) J. Lederberg
(c) S. Benzer
(d) T.H. Morgan
Ans. (c)

20. Barbara Mc Clintock work showed that in maize
(a) RNA transcribed from genes is report to form mature mRNA
(b) genes are stably located at specific sites of chromosomes
(c) certain genes move from one chromosome to another or within the same chromosome
(d) genes are exchanged between chromosomes during chiasmata formation
Ans. (c)

21. Which one of the following scientists developed the process of DNA fingerprinting?
(a) Kary B. Mullis
(b) T. H. Morgan
(c) H. O. Smith
(d) Alec Jeifreys
Ans. (d)

22. Which one of the following is related with genetic engineering?
(a) Plasmids
(b) Mitochondria
(c) Mutations
(d) Ribosomes
Ans. (a)

23. Which one of the following is related with genetic engineering?
(a) Plasmids
(b) Mitochondria
(c) Mutations
(d) Ribosomes
Ans. (a)

24. Restriction enzymes are isolated chiefly from
(a) algae
(b) fungi
(c) protozoans
(d) procaryotes
Ans. (d)

25. Restriction endonucleases are utilised in genetic engineering techniques as
(a) molecular cement for combining DNA bits into long chains
(b) molecular scalpels for cutting DNA at specific sites
(c) molecular scalpels for cutting DNA break up
(d) molecular build up nucleotides in tandem

Ans. (b)