11. The correct order of steps in Polymerase Chain Reaction
(PCR) is
(1) Denaturation, Extension, Annealing
(2) Annealing, Extension, Denaturation
(3) Extension, Denaturation, Annealing
(4) Denaturation, Annealing, Extension
(2) Annealing, Extension, Denaturation
(3) Extension, Denaturation, Annealing
(4) Denaturation, Annealing, Extension
Ans: (4) Denaturation, Annealing, Extension
12. Select the correct match
(1) T.H. Morgan - Transduction
(2) F2 × Recessive parent - Dihybrid cross
(3) Ribozyme - Nucleic acid
(4) G. Mendel – Transformation
(1) T.H. Morgan - Transduction
(2) F2 × Recessive parent - Dihybrid cross
(3) Ribozyme - Nucleic acid
(4) G. Mendel – Transformation
Ans: (3) Ribozyme - Nucleic acid
13. A ‘new’ variety of rice was patented by a foreign company,
though such varieties have been present in India for a long time. This is related to
(1) Lerma Rojo (2) Sharbati Sonora (3) Co-667 (4) Basmati
(1) Lerma Rojo (2) Sharbati Sonora (3) Co-667 (4) Basmati
Ans: (4) Basmati
14.
Which of the following pairs is wrongly matched?
(1) XO type sex : Grasshopper
determination
(2) ABO blood grouping : Co-dominance
(3)
Starch synthesis in pea : Multiple alleles
(4) T.H. Morgan : Linkage
Ans: (3) Starch synthesis in pea : Multiple
alleles
15.
Select the correct statement
(1) Spliceosomes take part in
translation
(2)
Punnett square was developed by a British scientist
(3) Franklin Stahl coined the term
‘‘linkage’’
(4) Transduction was discovered by S.
Altman
Ans: (2) Punnett square was developed by a
British scientist
16.
The experimental proof for semiconservative replication of DNA was first shown
in a
(1) Plant (2) Bacterium (3) Fungus (4) Virus
Ans: (2) Bacterium
17.
Which of the following flowers only once in its life-time?
(1) Mango (2) Jackfruit (3) Bamboo species (4) Papaya
Ans: (3) Bamboo species
18.
Offsets are produced by
(1) Parthenocarpy
(2) Mitotic divisions
(3) Meiotic divisions
(4) Parthenogenesis
Ans: (2)
Mitotic divisions
19.
Select the correct match
(1) Matthew Meselson and F. Stahl -
Pisum sativum
(2) Alfred Hershey and Martha Chase –
TMV
(3) Alec Jeffreys – Streptococcus pneumoniae
(4) Francois Jacob and Jacques Monod -
Lac operon
Ans:
20. Which of the following has proved helpful in preserving
pollen as fossils?
(1) Oil content
(2) Cellulosic intine
(3) Pollenkitt
(4) Sporopollenin
(1) Oil content
(2) Cellulosic intine
(3) Pollenkitt
(4) Sporopollenin
Ans: (4) Sporopollenin