R4RIN – MCQs, Mock Tests | Agriculture Agriculture Agriculture Genetics Plant Breeding and Biotechnology Set-4

Specific combining ability of the parents should be high in order to develop:

1. Hybrids
2. Composites
3. Varieties
4. Synthetics

✅ Correct Answer: 1

Spikelets are characteristic of the family:

1. Umbelliferae
2. Gramineae
3. Malvaceae
4. Leguminoceae

✅ Correct Answer: 2

Sporogenesis means:

1. Formation of zygote
2. Formation of embryo
3. Germination of seed
4. Development and formation of spores

✅ Correct Answer: 4

Stems often bear:

1. Unicellular hairs
2. Multicellular hairs
3. Both (a) & (b)
4. None of above

✅ Correct Answer: 2

Sterility is most pronounced in the F1 generation following:

1. Intervarietal hybridization
2. Intravarietal hybridization
3. Intraspecific hybridization
4. Interspecific hybridization

✅ Correct Answer: 4

Sterility incompatibility of distant crosses can e overcome to produce hybrids by:

1. Pollen culture
2. Anther culture
3. Explants culture
4. Embryo culture

✅ Correct Answer: 4

Stilt roots are produced from:

1. Maint root
2. Secondary roots
3. Stem and branches
4. None of above

✅ Correct Answer: 3

Sudden and sharp change in individual and is directly inherited by the offspring is called:

1. Mutation
2. Adaptation
3. Heredity
4. Continuous variation

✅ Correct Answer: 1

Sunflower is:

1. Annual herb
2. Biennial herb
3. Perennial herb
4. None of the above

✅ Correct Answer: 1

Superiority of heterozygote leads to:

1. Fixation of recessive allele
2. Fixation of dominant allele
3. Maintenance of both the alleles
4. Depression of inbreeding

✅ Correct Answer: 1

System of classification proposed by Hutchinson is:

1. Natural
2. Artificial
3. Phylogenetic
4. Numerical

✅ Correct Answer: 3

Tetraploid potato has 48 chromosomes whereas ordinary piploid species have _______ chromosomes:

1. 34
2. 24
3. 14
4. 10

✅ Correct Answer: 2

Which of the following material makes the protein chain?

1. Carbohydrates
2. Sugars
3. Fatty acids
4. Aminoacids

✅ Correct Answer: 4

Which of the following leads to the cross-pollination?

1. Unisexuality
2. Dichogamy
3. Heterostyly
4. All the above

✅ Correct Answer: 4

The application of principles of genetics for the improvement of mankind is:

1. Herdity
2. Linkage
3. Population genetics
4. Eugenics

✅ Correct Answer: 4

The attraction between two dissimilar molecules is:

1. Cohesion
2. Adhesion
3. Surface tension
4. None of the above

✅ Correct Answer: 2

Which of the following is sub-aerial modification of stem?

1. Corm
2. Stolon
3. Thorn
4. Bulb

✅ Correct Answer: 2

The basis on which evolution works is:

1. Simplicity
2. Complexity
3. Variations
4. Adaptation

✅ Correct Answer: 3

The best-known artificial system of classification is that promulgated by:

1. Sir Julian Huxley
2. Bentham and Hooker
3. Linnaeus
4. A.P. Candolle

✅ Correct Answer: 3

The best method to break the unfavourable linkage is:

1. Single seed descent method
2. Diallel selective mating
3. Pedigree method
4. Bulk method

✅ Correct Answer: 2

The best method to carry forward the maximum number of genotypes/genes to the advanced generations against the force of natural selection is:

1. Pedigree method
2. Bulk method
3. Single seed descent method
4. Back cross method

✅ Correct Answer: 3

The botanical name of the onion is:

1. Allium sativum
2. Allum cepa
3. Pisum sativium
4. Tagetes erecta

✅ Correct Answer: 2

The branch of genetics concerned with the study of frequencies of mating populations is:

1. Quantitative genetics
2. Behavioural genetics
3. Population genetics
4. Eugenetics

✅ Correct Answer: 3

The cell sap of cell A has an osmotic potential of -14 bars and turgor pressure of 4 bars. Cell B has a water potential of -16 bars and osmotic potential of -24 bars. The water movement will be:

1. From A to B
2. From B to A
3. No movement
4. None of the above

✅ Correct Answer: 1

The chromosomal aberrations include:

1. Duplication or deficiency
2. Translocations or inversions
3. Multiplication or polyploidy
4. All of these

✅ Correct Answer: 4

The chromosomes are attached to the spindle fibre by means of:

1. Pellicle
2. Telomere
3. Satellite body
4. Centromere

✅ Correct Answer: 4

The commonest form of the ovule is:

1. Orthotropous
2. Anatropous
3. Amphilotropous
4. Campylotropous

✅ Correct Answer: 2

The components of synthetic population would have already been tested for:

1. SCA
2. Genetic advance
3. CGA
4. Both GCA & SCA

✅ Correct Answer: 3

Which of the following is ploidy level of common wheat?

1. Tetraploid
2. Hexaploid
3. Diploid
4. Octaploid

✅ Correct Answer: 2

The condition in which the anthers and stigmas of a bisexual flower mature at the same time is known as:

1. Cleistogamy
2. Heterogamy
3. Syngamy
4. Homogamy

✅ Correct Answer: 4

The condition in which the pollen of a flower has no fertilizing effect on the stigma of the same flower is called:

1. Herkogamy
2. Dichogamy
3. Dicliny
4. Self-sterility

✅ Correct Answer: 4

The definitive nucleus on fertilization gives:

1. Secondary
2. Zygote
3. Oospore
4. Primary endospermic nucleus

✅ Correct Answer: 3

The diffusion of water through a differentially permeable membrane is called:

1. Osmosis
2. Imbibition
3. Diffusion
4. Water movement

✅ Correct Answer: 1

The DNA is made up of the following four bases:

1. A.T.G.E.
2. A.T.G.C.
3. A.T.U.C.
4. A.G.U.C.

✅ Correct Answer: 2

The edible part of the apple is:

1. Mesocarp and endocarp
2. Endosperm
3. Only mesocarp
4. Fleshy thalamus

✅ Correct Answer: 4

The effect of the genotype of the pollen grain on the phenotype of the seed is termed as:

1. Apospory
2. Pollinia
3. Endopolyploidy
4. Xenia

✅ Correct Answer: 4

The embroid (formed by vegetative cell) develops into a plant which in fact grows out of anther as in:

1. Tobacco
2. Wheat
3. Barley
4. Sorghum

✅ Correct Answer: 1

The evolutionary history of a species is referred as:

1. Phylogeny
2. Progeny
3. Organic evolution
4. Natural selection

✅ Correct Answer: 1

The factor that determine the movement of solutes through a membrane is:

1. Concentration gradient
2. Molecular size
3. Charge and active transport
4. All the above

✅ Correct Answer: 4

The fibrous fruit of coconut is dispersed by:

1. Air
2. Water Potential
3. Animals
4. None of the above

✅ Correct Answer: 2

The first easily observed sign of a water deficit in a plant is decrease in the tugor of its:

1. Root hairs
2. Stem cells
3. Xylem vessels
4. Leaf cells

✅ Correct Answer: 4

The first generation progeny of a hybrid are called:

1. Pure lines
2. Segregates
3. Parents
4. F1 plants

✅ Correct Answer: 2

The first inbreeding experiments with maize were those reported by:

1. Sprengel in 1866
2. Darwin in 1876
3. Sprague in 1886
4. Baird 1896

✅ Correct Answer: 2

Which of the following is not xerophytic plant?

1. Aloe
2. Cacti
3. Gum tree
4. Mango

✅ Correct Answer: 4

The flattened lateral outgrowth of the stem or the branch developing exogenously from a node and having a bud in its axil as known as:

1. Tendril
2. Thorn
3. Leaf
4. Flower

✅ Correct Answer: 3

The fleshy edible part of the mango fruit is:

1. Epicarp
2. Endocarp
3. Mesocarp
4. Pericarp

✅ Correct Answer: 3

The fleshy food storage tissue lying immediately with in perisperm is called:

1. Endosperm
2. Testa
3. Cruncle
4. None of the above

✅ Correct Answer: 1

The following character in human beings can explain the sex linked inheritance:

1. Baldness
2. Eye colour
3. Haemophilia
4. Pattern of the hair

✅ Correct Answer: 3

The following organelles also contain DNA:

1. Endoplasmic reticulum
2. Centrosomes
3. Vacuoles
4. Chloroplast

✅ Correct Answer: 4

The following part of the chromosome is responsible for the movement of chromosome/chromatid to different poles:

1. Chromatin
2. Centromere
3. Chromomere
4. Satellite

✅ Correct Answer: 2

Which of the following ions is involved in the opening and closing of stomata?

1. Mg2+
2. Fe2+
3. K+
4. Na+

✅ Correct Answer: 3

The fruit of Acacia is:

1. Lomentum
2. Double samara
3. Regma
4. Cypsela

✅ Correct Answer: 1

The fruit of cumin or coriander is known as:

1. Lomentum
2. Cremocarp
3. Regma
4. Cypsela

✅ Correct Answer: 2

The fruits of cucurbitaceae is:

1. Pepo
2. Pome
3. Berry
4. Drupe

✅ Correct Answer: 1

The fusion of a male gamete with two polar nuclei is often termed:

1. Fertilization
2. Syngamy
3. Triple fusion
4. Pollination

✅ Correct Answer: 3

The genes that intensify or diminish the effect of major genes are known as factors:

1. Modifying
2. Nullifying
3. Nullifying
4. None of these

✅ Correct Answer: 1

The green expanded part of leaf is called as:

1. Leaf blade or lamina
2. Petiole
3. Petiole
4. Leaf base

✅ Correct Answer: 1

The group of plants which bear flowers and seeds are known as:

1. Crytogams
2. Phanerogams
3. Pteridophyta
4. None of the above

✅ Correct Answer: 2

The haploid phase in plants is called :

1. Sporophyte
2. Gametophyte
3. Zygote
4. None of the above

✅ Correct Answer: 2

The hydrophytes float on water because of the presence of:

1. Aerenchyma
2. Aerenchyma
3. Aerenchyma
4. Sclerenchyma

✅ Correct Answer: 1

The inflorescence of banana is known as:

1. Catkin
2. Raceme
3. Spike
4. Spadix

✅ Correct Answer: 4

The initial pool of a composite population is composed of:

1. Inbred lines
2. Isoline
3. Pure lines
4. Single plants derived from crosses and/or germplasm lines

✅ Correct Answer: 1

The initial gene pool of a synthetic population is composed of:

1. Plants from an open-pollinated variety
2. Pure lines
3. Inbred lines
4. Isolines

✅ Correct Answer: 3

The jointed stem with solid nodes and hollow internodes is called:

1. Caudes
2. Culm
3. Scape
4. None of the above

✅ Correct Answer: 2

The life first originated in:

1. Air
2. Soil
3. Water
4. All of above

✅ Correct Answer: 3

The life-cycle of an angiosperm is consist of:

1. Sporophytic stage
2. Gametophytic stage
3. Both stages
4. None of the above

✅ Correct Answer: 3

The main body of ovule is called:

1. Hilum
2. Chalaza
3. Nucellus
4. Integuments

✅ Correct Answer: 3

When the pistil has all the carpals united together it is said to be:

1. Apocarpous
2. Syncarpous
3. Simpler types
4. None of the above

✅ Correct Answer: 2

The main patterns concerning origin and domestication of cultivated plant species are:

1. Mendelian variation
2. Inter-specific hybridization
3. Polyploidy
4. All of these

✅ Correct Answer: 4

The main reason for the classification of plants is:

1. The difficulties arising in the study of plants because of their large number
2. Their mechanical separation
3. The nature of man
4. The environmental conditions

✅ Correct Answer: 1