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

Question: Plants having similar genotypes produced by plant breeding are called
a) Clone
b) Haploid
c) Autopolyploid
d) Genome
Answer: d

Question: Haploids are considered better genetic stock because they
a) Need only half of the total nutrients
b) Are best for cytological studies
c) Grow better under all conditions
d) Form homozygous individuals on diploidization
Answer: d

Question: One of the following is an improved variety of chicken
a) Jersey
b) Leg horn
c) Himigiri
d) Kalyan Sona
Answer: b

Question: Improved rice variety IR-8 has been introduced in India from
a) Taiwan
b) Japan
c) Philippines
d) Bangladesh
Answer: c

Question: Triticale is the first man-made cereal crop. The combination of parents involved in its production is Triticum and
a) Sorghum
b) Barley
c) Saccharum
d) Rye
Answer: d

Question: Mule is produced by a cross between
a) a mare and a donkey
b) a female donkey and a male horse
c) a male and a female donkey
d) a male and a female horse
Answer: a

Question: Improved varieties of wheat suitable for Indian climate have been developed by
a) hybridization and mutation
b) mutation and cloning
c) cloning and polyploidy
d) polyploidy and hybridisation
Answer: a

Question: Autopolyploidy can be induced artificially by
a) Chloroform
b) Colchicine
c) Chloroquine
d) Colchine
Answer: b

Question: Which of the following methods is/are used in recovery of healthy plants from diseased plants?
a) embryo culture
b) meristem culture
c) suspension culture
d) anther culture
Answer: b

Question: In high yielding hybrid crop varieties, to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year because
a) they are not allowed to grow their own seeds
b) the hybrid vigour is lost due to inbreeding depression
c) the Government of India has accepted Dunkel’s proposal
d) it is cheaper to purchase fresh seed
Answer: b

Question: Amino acids present in improved varieties of maize are
a) methionine and alanine
b) alanine and cysteine
c) methionine and cysteine
d) lysine and tryptophan
Answer: a

Question: The process of cultivating and bringing about certain changes in the wild forms so that they yield better under artificial growing conditions is called
a) domestication
b) breeding
c) conservation
d) selection
Answer: a

Question: A breed of cow is mated with closely related breed for five generations. It was found that production of milk has reduced subsequently and the animals are not keeping good health. Which of following methods of animal breeding can overcome this problem?
a) hybridisation
b) controlled breeding
c) outcrossing
d) cross breeding
Answer: c

Question: Electrofusion or chemofusion is used for
a) Cloning
b) Mutations
c) Protoplast fusion
d) Eugenics
Answer: c

Question: Which one of the following characters was most important for selection of present day maize plants?
a) Herbaceous habit
b) Unisexual flowers
c) Cobs covered tightly by spathes
d) Annual life span
Answer: b

Question: The indica variety of rice is crossed with japonica variety of rice because the later are
a) high yielding
b) resistant to diseases
c) cheaper
d) short-life cycled annual
Answer: b

Question: Select the correct statements
a) Our present day crop plants are entirely different from their wild ancestors as almost all our present day crops are the result of selections carried out by the prehistoric human beings
b) Almost all our present day crops are the result of selections carried out by the prehistoric human beings.
c) Feeding of rarer plants into agriculture and horticulture trade is of great advantage to genetic conservation.
d) All of the above
Answer: d

Question: The application of induced mutations for crop improvement is called
a) Mutation breeding
b) Apomixis
c) Adventive embryony
d) Cloning
Answer: a

Question: In shoot and root culture, excess of auxin in the medium will promote
a) shoot culture
b) root culture
c) both shoot and root culture
d) none of these
Answer: b

Question: Which one of the following is called macaroni wheat which is mainly used for preparing pasta and noodles?
a) Triticum turgidum
b) Triticum durum
c) Triticum speltoides
d) Triticum tauschii
Answer: b

Question: Disease free plants are obtained from
a) Anther culture
b) Ovary culture
c) Shoot-apex culture
d) Root-apex culture
Answer: c

Question: The loss of genes from a gene pool is called
a) Gene knockout
b) Gene flow
c) Gene shift
d) Genetic erosion
Answer: a

Question: What was the source of first induced mutations?
a) Gamma ray
b) UV-irradiation
c) X-ray
d) Cosmic rays
Answer: a

Question: Crosses between two plants by the same variety are called
a) Interspecific
b) Intervarietal
c) Intravarietal
d) Intergeneric
Answer: c

Question: The plant part which is used to culture is called
a) Explant
b) Endplant
c) Transplant
d) Callus
Answer: a

Question: Culturing of isolated plant organs is called
a) Organ culture
b) Explant culture
c) Organism culture
d) Both Organ culture and Explant culture
Answer: d

Question: Which one of the following is the common hexaploid bread wheat?
a) Triticum aestivum
b) Triticum durum
c) Triticum monococcum
d) Triticum turgidum
Answer: a

Question: Tissue culture technique can produce indefinite number of new plants from a small parental tissue. The economic importance of the technique is in raising
a) variants through picking up somaclonal variation
b) genetically uniform population of an elite species
c) homozygous diploid plants
d) development of new species
Answer: a

Question: Pollen grains of a plant whose 2n = 28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?
a) 14
b) 56
c) 28
d) 21
Answer: d

Question: Protection of genetic resources is called
a) Genetic drift
b) Gene pool
c) Genetic conservation
d) Gene flow
Answer: c

Question: Multiple ovulation embryo transfer technology (MOET) induces which of the following in cow?
a) super ovulation
b) follicular maturation in ovary
c) ovulation
d) Both a and b
Answer: d

Question: Green revolution in India was possible due to
a) better irrigation, fertilizers and pesticide facilities
b) exploitation of high yielding varieties
c) intensive cultivation
d) All of the above
Answer: a

Question: One of the following species of wheat was most primitive and wild
a) Triticum monococcum
b) Triticum durum
c) Triticum turgidum
d) Triticum boeoticum
Answer: b

Question: The most common sources of single cell protein are
a) yeasts
b) bacteria
c) other fungi
d) All of these
Answer: c

Question: Germ plasm also preserve rare genotype for
a) Cultivation on large scale
b) Tracing the history of evolution
c) Breeding and improvement
d) Chromosome study and phytogeny of cytotypes
Answer: d

Question: Select the one of the following pairs which is correctly matched
a) Inbreeding: Cross pollination
b) Hybrid vigour: Lost due to inbreeding depression
c) Male sterility: Self pollination
d) Triticum boeoticum: First domesticated wheat
Answer: b

Question: What was the colour of high yielding Mexican wheat?
a) White
b) Pink
c) Red
d) Grey
Answer: d

Question: Which of the following is/are the advantage(s) of micropropagation?
a) it helps in rapid multiplication of plants
b) it helps in production of somaclones
c) it is an easy, safe and economical method for plant propagation
d) All of the above
Answer: d

Question: The set pollinated progeny of a homozygous plant constitute a
a) Pure line
b) Mixed population
c) Mass selection
d) Heterosis
Answer: a

Question: In hybridization the haploids combine the advantages of
a) recombination
b) segregation
c) fixation
d) All of the above
Answer: c

Question: Wild varieties of plants must be conserved to
a) Maintain ecosystem
b) Feeding wild animals
c) Future evolution
d) Incorporate useful traits in future crop varieties
Answer: d

Question: In which crops is the method of mass selection applied
a) Cross-pollinated
b) Self-pollinated
c) Both self and cross-pollinated
d) Potato and sugarcane
Answer: d

Question: Which part of the plant is best suited for making virus free plants?
a) Apical meristem
b) Lenticels
c) Bark of stem
d) Root cap
Answer: a

Question: A crop-produce should provide the optimum nutrition and must not contain an
a) Aminutritional factor
b) Cysteine
c) Polyunsaturated fatty acids
d) Lysine
Answer: a

Question: Which one of the following substance is responsible for callus formation
a) 2,4-D
b) NAA
c) BAP
d) PEG
Answer: a

Question: Man made crop “Triticale” in a Hybrid between
a) Wheat and Rye
b) Rice and Barley
c) Maize and Barley
d) Rice and Maize
Answer: a

Question:  Which of the following procedures is/are followed in dairy farm management?
A. regular inspections and visits by veterinary doctors
B. usage of manure to increase crop yields
C. adequate environmental condition is provided
D. weeding away unproductive and harmful plants from the brood house.
a) A and Bare correct
b) A and Care correct
c) C and D are correct
d) All are’correct
Answer: a

Question: Which of the following points should be kept into consideration for successful bee keeping?
A. selection of suitable location for keeping the beehives
B. light management according to the habits of honey bees
C. knowledge of the behaviour of honey bees
D. handling and collection of honey and bee wax.
a) A, B, C
b) A, C, D
c) A, B, C, D
d) None
Answer: d

Question: Which of the following diseases is/are poultry disease?
A. aspergillosis B. ranikhet disease
C. gill rot D. black rot.
a) Both A and B
b) Both C and D
c) Only C
d) Only D
Answer: d

Question: Select the correct statement(s) –
I. IARI ha released a mustard variety rich in vitamin C.
II. Pusa Sawani variety of Okra is resistant to aphids
III. Hairiness of leaves provides resistance to insect pests
IV. Agriculture accounts for approximately 33% of India’s GDP and employs nearly 62% of the population.
a)-Und II
b) II and III
c) I, III and IV
d) None
Answer: a