CBSE Class 12 Biology Strategies for Enhancement in Food Production MCQs Set A

Question :  The chances of contacting bird flu from a properly cooked (above 100°C) chicken and egg are

a) None of these

b) moderate

c) high

d) very high

Answer :  None of these

Question :  A group of animals which are related by descent and share many similarities are referred to as

a) breed

b) race

c) variety

d) species

Answer :  breed

Question :  Inbreeding is carried out in animal husbandry because it

a) increases homozygosity

b) increases heterozygosity

c) improves the breed

d) increases vigour

Answer :  increases homozygosity

Question :  Sonalika and Kalyan Sona are varieties of

a) wheat

b) rice

c) millet

d) tobacco

Answer :  wheat

Question :  Which one of the following is not a fungal disease?

a) Black rot of crucifers

b) Smut of Bajra

c) Rust of wheat

d) Red rot of sugarcane

Answer :  Black rot of crucifers

Question :  In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because

a) the cell division of meristems are faster than the rate of viral multiplication

b) Viruses cannot multiply within meristem cell (s).

c) meristems have anti viral compounds

d) the dividing cells are virus resistant

Answer :  the cell division of meristems are faster than the rate of viral multiplication

Question :  Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of

a) early yielding rice variety

b) better irrigation facilities

c) shorter rice plant

d) disease resistant rice variety

Answer :  early yielding rice variety

Question :  Which of the following is not used for crop improvement?

a) Introduction

b) Hybridization

c) Mutations

d) Inbreeding

Answer :  Introduction

Question :  Pulses usually lack amino acids

a) Cysteine and methionine

b) methionine

c) methionine

d) methionine

Answer :  Cysteine and methionine

Question :  Which part is most suitable for raising virus free plants in micropropagation

a) Meristem

b) Node

c) Vascular tissue

d) Bark

Answer :  Meristem

Question :  Which one of the following combination would a sugarcane farmer look for in the sugarcane crop?

a) Thick stem, long internodes, high sugar content and disease resistant

b) Thick stem, high sugar content and profuse flowering

c) Thick stem, short internodes, high sugar content, disease resistant

d) Thick stem, low sugar, conten, disease resistant

Answer :  Thick stem, long internodes, high sugar content and disease resistant

Question :  Fungicides and antibiotics are chemicals that

a) kill pathogenic fungi and bacteria, respectively

b) enhance yield and disease resistance

c) kill all pathogenic microbes

d) kill pathogenic bacteria and fungi respectively

Answer :  kill pathogenic fungi and bacteria, respectively

Question :  Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed

a) mutation breeding

b) gene therapy

c) transgenic mechanism

d) recombinant DNA technology

Answer :  mutation breeding

Question :  The scientific process by which crop plants are enriched with certain desirable nutrients is called

a) bio-fortification

b) bio-remediation

c) breeding

d) crop protection

Answer :  bio-fortification

Question :  The term ‘totipotency’ refers to the capacity of a:

a) cell to generate whole plant

b) bud to generate whole plant

c) seed to germinate

d) cell to enlarge in size

Answer :  cell to generate whole plant

Question :  Grains of major cereals and millets lack amino acids

a) Lysine and tryptophan

b) Tryptophan and cysteine

c) Tryptophan and cysteine

d) Tryptophan and cysteine

Answer :  Lysine and tryptophan

Question :  Identify the edible fresh water teleost

a) Catla catla

b) Hilsa ilisha

c) Rays and skates

d) None of these

Answer :  Catla catla

Question :  The desired varieties of economically useful crops are raised by

a) Hybridisation

b) Natural selection

c) Vernalisation

d) Mutation

Answer :  Hybridisation

Question :  Cross between unrelated organisms is

a) Hybrid

b) Back cross

c) Heterosis

d) Test cross

Answer :  Hybrid

Question :  Pisciculture is rearing and production of

a) Fishes

b) Birds

c) Reptiles

d) Reptiles

Answer :  Fishes