R4RIN – MCQs, Mock Tests | Agriculture Agriculture Agriculture Genetics Plant Breeding and Biotechnology Set-6.

Genotype x Environment interaction would take place when there is/are:

1. One genotype and two environments
2. Two genotypes and one environment
3. Three genotypes and one environment
4. Two or more genotypes and two or more environments

✅ Correct Answer: 2

Germplasm means:

1. A breeding method
2. A collection of genetic material
3. A new disease
4. None of the above

✅ Correct Answer: 2

Gibberellins are now commercially used into increase sugarcane growth and sugar yields :

1. China
2. Hawaii
3. Japan
4. Korea

✅ Correct Answer: 2

Ginger and Turmeric are example of modified stem:

1. Rhizome
2. Tuber
3. Bulb
4. Corm

✅ Correct Answer: 1

Given that the somatic cromosome number of Triticum aestivum is 2n = 6x = 42 which one of the following pairs is correctly matched?

1. Monosome
2. Monosome
3. Tetrasome
4. Nullisome

✅ Correct Answer: 3

Mendel is famous for:

1. Propounding the laws of inheritance
2. Laws of limiting factors
3. The theory of mutation
4. The discovery of penicillin

✅ Correct Answer: 1

Group of plants with similar characteristics of any rank is termed:

1. Taxon
2. Species
3. Genus
4. Order

✅ Correct Answer: 1

Gynoecium or pistil in the female whorl differentiated into:

1. Filament
2. Style
3. Stigma
4. All of the above

✅ Correct Answer: 4

Holophytes growing on muddy swarmps form special vegetation known as:

1. Hangrove forests
2. Coniferous forests
3. Evergreen forests
4. Riparian forests

✅ Correct Answer: 1

Heritability may be defined as the:

1. Interaction product of genotype with environment
2. Sum total of hereditary material present in a species
3. Degree of resemblance between the original and the selected plants
4. Proportion of phenotypic variability which is due to heredity

✅ Correct Answer: 4

152. Heterosis is commercially exploited in:

1. Cross pollinated species
2. Often cross-pollinated species
3. Self-pollinated species
4. Vegetatively propagated species

✅ Correct Answer: 1

Heterosis over the better parent is called as:

1. Relative heteroisi
2. Standard heterosis
3. Pseudoheterosis
4. Heterbeltiosis

✅ Correct Answer: 4

How many cells will be produced from a cell if the cell divides meiotically?

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 4

Hugo de Vries who defined the mutation was:

1. Dutch Botanist
2. French Bacteriologist
3. English Botanist
4. Russian Biologist

✅ Correct Answer: 1

Hybrid seeds can be produced through open pollination with the use of:

1. Inbreds
2. Clones
3. Pure lines
4. Male sterile lines

✅ Correct Answer: 1

Hydrilla is a:

1. Hydrophyte
2. Mesophyte
3. Hygrophyte
4. Xerophyte

✅ Correct Answer: 1

ICRISAT deals with:

1. Cotton
2. Maize
3. Millets
4. Wheat

✅ Correct Answer: 3

If a character is cytoplasmically controlled then:

1. The progeny resembles female parent
2. The progeny resembles male parent
3. Its segregation of 3:1 is observed in F1
4. 15:1 segregation in F1

✅ Correct Answer: 1

If a dihybrid is test crossed the phenotypic ratio of progeny will be:A. B. C. D.

1. 9:3:3:1
2. 9;3;4
3. 1:1:1:1
4. 15;1

✅ Correct Answer: 3

If a membrane allows the passage of both solvent and solute molecules it is said to be:

1. Non-permeable
2. Impermeable
3. Semi-Permeable
4. Permeable

✅ Correct Answer: 4

If dissolved sugar in pure water the resulting solution will have osmotic potential than that of pure water:

1. Equal
2. More positive
3. More negative
4. Difficult to measure

✅ Correct Answer: 3

If more solute is added to a saturated solution it settles down but if heated the excess amount also gets dissolved. Such a solution said to be:

1. Unsaturated
2. Saturated
3. Super saturated
4. Crystalloid

✅ Correct Answer: 3

If parents differ in ten gene pairs no selection is done; six back crosses will produce a population having ______ per cent homozygous and identical individuals to recurrent parent at all ten loci:

1. 65
2. 75
3. 85
4. 95

✅ Correct Answer: 3

If the cells of a plant root tip contain chromosomes will be found in its pollen grains?

1. 4
2. 8
3. 16
4. 32

✅ Correct Answer: 2

If the particles of dispersed phase have an affinity towards the particles of the dispersion medium the colloidal system is known as:

1. Lyophobic
2. Hydrophobic
3. Lyophilic
4. None of the above

✅ Correct Answer: 3

In ______ pollen dispersal is poor and seed set is likely to be low on male sterile plants:

1. Tomato
2. Cauliflower
3. Broccoli
4. Carrot

✅ Correct Answer: 1

In ______ the first studies on artificial hybridization for which yields were reported were those of Beal during the period between 1877 and 1882:

1. Sorghum
2. Pearlmillet
3. Maize
4. Carrot

✅ Correct Answer: 3

In Angiosperms:

1. Sporophyte is complex and gametophyte incospicuous
2. Sporophyte simple and gametophyte complex
3. Sporophyte and gemetophyte complex
4. Sporophyte and gametophyte incospicuous

✅ Correct Answer: 4

In asparagus one or more short green cylindrical or sometimes flattened branches of limited growth develop from node of stem such a branch is known as:

1. Cladode
2. Phylloclade
3. Stem tendril
4. Thorn

✅ Correct Answer: 1

In bajra:

1. Cytoplasmic male sterility is found
2. Genetic male sterility is found
3. Cytoplasmic genetic male sterility is found
4. Self-incompatibility is found

✅ Correct Answer: 3

In C4 pathway CO2 combines with:

1. Ribulose monophosphate
2. Phosphoglyceric acid
3. Ribulose diphosphate
4. Phosphenol pyruvate

✅ Correct Answer: 3

In China rose flower is:

1. Hypogynous
2. Perigynous
3. Epigynous
4. None of the above

✅ Correct Answer: 1

In compositeae the gynoecium is syncarpous bicarpellary with:

1. Marginal placentation
2. Axile placentation
3. Free central placentation
4. Basal placentation

✅ Correct Answer: 3

In cotton the popularly grown commercial hybrid varalaxmis is the product of:

1. Intraspecific hybridization in Gossypium hirsutum
2. Interspecific hybridization between Gossypium hirsutum and Gossypium barbadense
3. Intraspecific hybridization in Gossypium barbadense
4. Interspecific hybridizaton between Gossypium arboreum and Gossypium herbaceum

✅ Correct Answer: 3

In cruciferae the stamens are said to be:

1. Decadynamous
2. Tridynamous
3. Tetradidynamous
4. None of the above

✅ Correct Answer: 3

In famtly malvaceae the stamens are:

1. Diadelphous
2. Gynandrous
3. Syngenesious
4. Monoadelphous

✅ Correct Answer: 4

In Ficus (banyan pepal fig) the inflorescence is:

1. Cyathuim
2. Verticillaster
3. Hypanthodium
4. Spadix

✅ Correct Answer: 3

Which sterility is exploited in hybrid seed production?

1. Male genetic sterility
2. Cytoplasmic sterility
3. Cytoplasmic genetic male sterility is found
4. Genetic

✅ Correct Answer: 3

Which one of the following is the site of protein synthesis?

1. Ribosomes
2. t-RNA
3. m-RNA
4. r-RNA

✅ Correct Answer: 1

In mass selection plants are selected on the basis of:

1. Phenotypes
2. Genotypes
3. Homozygosity
4. None of the above

✅ Correct Answer: 1

In pedigree breeding single plants are selected in which one of the following generation:

1. F5
2. F3
3. F2
4. F

✅ Correct Answer: 3

In potato the inflorescence is:

1. Helicoid
2. Scropioid cyme
3. Umbel
4. Raceme

✅ Correct Answer: 1

In Primula sp:

1. Sporophytic incompatibility found
2. Gametophytic incompatibility found
3. Heteromorphic incompatibility found
4. Homomorphic incompatibility found

✅ Correct Answer: 3

In RNA nitrogen bases are same as in DNA except:

1. Uracil instead of Thymlnine
2. Cytosin instead of Thymine
3. Adenine instead of Guanine
4. Thymine instead of Adenine

✅ Correct Answer: 1

In self-incompatibility system:

1. Pollen not produced
2. Self pollination takes place
3. Pollen does not germinate on self-pollination
4. All are correct

✅ Correct Answer: 3

In solanaceae the flowers are:

1. Actionomorphic bisexual and epigynous
2. Zygomorphic unisexual and perigynous
3. Actinomorphic bisexual and hypogynous
4. Actinomorphic bisexual and perigynous

✅ Correct Answer: 3

Which one f the following is not dioecious plant?

1. Datepalm
2. Vallisnaria
3. Maize
4. Papaya

✅ Correct Answer: 3

In sweet pea gene C or P alone produces white flower where as both C and P are needed to produce purple coloured flower. In a particular cross between two white flowered plants the offsprings were one half purple and one-half white. The possible genotypes of the parents is:

1. Cc Pp x ccPp
2. CCpp x ccPP
3. ccPp x CCpp
4. Ccpp x ccPp

✅ Correct Answer: 3

In the cymose inflorescence the flowers develop in:

1. Basipetal succession
2. Acropetal succession
3. Centripetal succession
4. None of the above

✅ Correct Answer: 1

In the flowering plants the process of fertilization is first discovered by:

1. Robert Brown
2. Strasburger
3. Virchov
4. Nawaschin

✅ Correct Answer: 2

In the ovary of marigold the placentation is:

1. Superficial
2. Basal
3. Marginal
4. Axile

✅ Correct Answer: 2

In the pitcher plant the pitcher is modification of:

1. Stem
2. Root
3. Leaf
4. Stem-branch

✅ Correct Answer: 3

In wheat and oat there are _____ genes for red versus white kernels:

1. Two
2. Three
3. Four
4. Five

✅ Correct Answer: 2

In wheat cross-pollination is:

1. Less than 5%
2. More than 5%
3. 15%
4. 50%

✅ Correct Answer: 1

In which one of the following crops maximum exploitation of hybrid vigour during the last three decades has been done?

1. Wheat
2. Rice
3. Maize
4. Cotton

✅ Correct Answer: 3

In which part of the cell does protein synthesis take place?

1. Mitochondria
2. Nucleolus
3. Nucleus
4. Ribosomes

✅ Correct Answer: 4

Inflorescence of wheat ear is:

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

✅ Correct Answer: 2

International Rice Research Institute (IRRI) is situated in:

1. Philippines
2. Japan
3. China
4. Burma

✅ Correct Answer: 1

It has been estimated that a miize tassel produces at least _____ pollen grains for each kernel.

1. 5,000
2. 15,000
3. 25,000
4. 35,000

✅ Correct Answer: 3

It is an established fact that higher and more complex forms of plants and animals have evolved from:

1. Recent and simpler forms
2. Earlier and simple forms
3. Recent and complex forms
4. Xerophytic forms

✅ Correct Answer: 2

Which one of the following chemicals is used to induce polyploidy?

1. Ethyl methane sulphonate
2. Methyl methane sulphonate
3. Colchicines
4. Nitrous acid

✅ Correct Answer: 3

Johansen proposed:

1. Theory of heterosis
2. Pure line theory
3. Male sterility
4. Hybridization

✅ Correct Answer: 2

Krebs cycle begins with:

1. Glycogen
2. Lysine
3. Succinic acid
4. Acetyl COA

✅ Correct Answer: 4

Later formed rocks show fossils of:

1. Less complex and less advance types
2. More complex and more advance types
3. Simpler types
4. Simpler and more recent types

✅ Correct Answer: 4

Leaf of the Mimosa is:

1. Unipinnate
2. Bipinnate
3. Tripinnate
4. Decompound

✅ Correct Answer: 2

Magnification of an object by electron microscope is:

1. 1000 X
2. 100000 X
3. 100000 X
4. More than 200000 X

✅ Correct Answer: 4

Maize is:

1. Maonecious plant
2. Dioecious plant
3. Polygamous
4. None of the above

✅ Correct Answer: 1

Most of the mutation have effect:

1. Deleterious
2. Good
3. Bad
4. Both (b) & (c)

✅ Correct Answer: 1

Male gamete carries ______ chromosome numbers:

1. Non-permeable
2. 2n
3. 3n
4. n - 1

✅ Correct Answer: 1

Mango fruit is a:

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

✅ Correct Answer: 4