Multiple Choice Questions and Answers on Molecular Basis of Inheritance

1 The energy source for the elongation process is

A Creatine-PO4

B GTP

C ATP

D All of the above

View Answer

Answer:GTP

2 The anticodon of initiation codon for protein synthesis is

A UUU

B AUG

C UAC

D CAU

View Answer

Answer:UAC

3 In lac-operon, which protein is not regulated by the repressor?

A Galactosidase

B Lactose Permease

C Tryptophan

D Transacetylase

View Answer

Answer: Tryptophan

4 Which enzyme is not produced during lactose catabolism by E.coli?

A 𝜷-galactosidase

B Lactose Permease

C Thiogalactoside transacetylase

D Lactose dehydrogenase

View Answer

Answer: Female heterogamety

5 The eukaryotic replication of DNA is

A Bidirectional with many origins

B Unidirectional with many origins

C Bidirectional with a single origin

D Unidirectional with a single origin

View Answer

Answer: Bidirectional with many origins

6 The amino acid coded by 3 codons is

A Proline

B Isoleucine

C Tryptophan

D Serine

View Answer

Answer:Isoleucine

7 Spliceosomes are absent in the cells of

A Plants

B Animals

C Bacteria

D None of the above

View Answer

Answer: Bacteria

8 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

View Answer

Answer:It should be structurally and chemically unstable

9 What will the amount of guanine in a DNA if the total amount of adenine and thiamine in the DNA is 45%?

A 45%

B 65%

C 27.5%

D 22.3%

View Answer

Answer: 27.5%

10 The primary control of gene expression takes place at the level of

A Translation

B Replication

C Transcription

D None of these

View Answer

Answer: Transcription

11 The gene sequence that codes for proteins are

A Exons

B Introns

C Intervening sequences

D Control regions

View Answer

Answer:Exons

12 The process of RNA splicing shows the dominance of

A RNA world

B DNA world

C Microbial world

D Protein world

View Answer

Answer: RNA world

13 In eukaryotes, RNA II facilitates transcription of

A rRNA

B mRNA

C hnRNA

D tRNA

View Answer

Answer: hnRNA

14 Human Genome Project led to the development of

A Biotechnology

B Bioinformatics

C Biosystematics

D Bioengineering

View Answer

Answer: Bioinformatics

15 Which non-radioactive isotope was used by Messelson and Stahl in their experiment?

A P32

B S35

C N15

D None of these

View Answer

Answer:N15

16 Histones are

A Positively charged and basic amino acids

B Positively charged and acidic proteins

C Negatively charged and basic proteins

D Absent in bacteria

View Answer

Answer: Absent in bacteria

17 Which of the following statement is false about DNA?

A Located in chromosomes

B Carries genetic information from parent to offspring

C Abundantly found in cytoplasm

D There is a precise correlation between the amount of DNA and number of sets of chromosome per cell

View Answer

Answer: Abundantly found in cytoplasm

18 Which of the following function of DNA is necessary for the purpose of evolution?

A Replication

B Transcription

C Translation

D Mutation

View Answer

Answer:Mutation

19 According to the phenotypic characters of pneumococcus considered in Griffith’s experiment of transformation, which of the following statements are correct?
i) Presence of slime layer
ii) Presence of capsule
iii) Absence of capsule
iv) Type of adhesion
v) Molecular makeup of capsule

A i, ii, iii

B ii, iii, iv

C ii, iii, v

D i, iv, v

View Answer