NEET 2018 Biology Questions(11-20)

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

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

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

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:(4) Francois Jacob and Jacques Monod - Lac operon

20. Which of the following has proved helpful in preserving pollen as fossils?
(1) Oil content
(2) Cellulosic intine
(3) Pollenkitt
(4) Sporopollenin

Ans: (4) Sporopollenin