Agriculture/Agriculture Agriculture Genetics Plant Breeding and Biotechnology Sample Test,Sample questions

Question:
  A cybrid is:

1.A sex hybrid

2.A hybrid formed by cell fusion

3.A plant produced by cell culture

4.Synonym to hybrid


Question:
  A fruit which develops from an inflorescence is known as:

1.Simple fruit

2.Aggregate fruit

3. Composite fruit

4.None of these


Question:
  A homozygous line developed by self-fertilization in a cross-pollinated crop is termed as:

1.Pureline

2.Inbred

3.Clone

4.Mutant


Question:
  A mixture of two immiscible liquids shaken up is:

1.Saturated solution

2.A suspension

3.An emulsion

4.Colloid


Question:
  A plant cell when put into a hypotonic solution it unlike animal cell does not brust because:

1.It has no semi-permeable membrane

2.It has inelastic cell wall

3.All both (a) & (b)

4.None of the above


Question:
  A successful establishment of vegetation in a new locality means:

1.Commensalisnt

2.Ecesis

3.Succession

4.Psammosere


Question:
  An individual having different alleles for any gene pair and producting two kinds of gametes is known as:

1.Hemizygous

2.Homozygous

3.Heterozygous

4.Heterogenous


Question:
  At the molecular level point mutations are due to:

1.Destruction of the bases

2.Destruction of the double helix

3.Shifting of a portion of the helix and bases

4.Alterations of sequences of base in DNA


Question:
  Biffin in 1905 announced that resistance to yellow rust of wheat is governed by ______ gene in crosses:

1.Single dominant

2. Single recessive

3.Double dominant

4.Double recessive


Question:
  Bread wheat is:

1.Haploid

2.Diploid

3.Tetraploid

4.Auto-allopolyploid


Question:
  With four bases A U G and C the possible number of triplet cordons are 64. If there is no uracil the number of codons will be:

1.3764

2.9764

3.27764

4.None of above


Question:
  With the increase in temperature the solubility of solid in a liquid:

1.Increases

2.Decreases

3.Both (a) & (b)

4.None of the above


Question:
 2n denotes:

1.Number of homozygote produces by selfing a F1

2.Number of types of gametes produced by F1

3.Number of types of heterozygote produced by selling F1

4.None of the above


Question:
 A complex of communities of plants and animals of a region existing under identical climatic conditions is called as:

1.Biome

2.Ecosystem

3.Ecological complex

4.Environment


Question:
 A condition in which pollination and fertilization take place in an unopened flower is termed as:

1.Homogamy

2.Apogamy

3.Polygamy

4.Cleistogamy


Question:
 A criss-cross inheritance is shown by:

1.Sex-influenced character

2.Polygamy

3.Sex-linked character

4.Sex-quantitative character


Question:
 A fruit which is collection of simple fruits developing from the apocarpous pistil of a flower is known as:

1.Multiple fruit

2.Aggregate fruit

3.Complex fruit

4.Simple fruit


Question:
 A generative nucleus in the male gametophyte divides _____ to form two male gametes:

1.Mitotically

2.Meiotically

3.Mitotically and Meiotically

4.None of these


Question:
 A male child would be born to parents if:

1.The father is healthier than the mother

2.The mother eats well during pregnancy

3.The genetic composition of the child includes XY combination of chromosomes

4.The genetic composition of the child includes XX combination of chromosomes


Question:
 A method of breeding most commonly used when the desired variation is required to be induced in a vegetatively propagated crop is:

1. Polyploidy

2.Pedigree method of breeding

3.Mutation breeding

4.Backcross method of breeding


Question:
 A plant breeder is interested to control pollination to:

1. Prevent cross-pollination

2.Control pollination

3.None of these

4.Both of these


Question:
 According to position of the ovule within the ovary an ovule may be:

1.Ascending

2.Pendulous

3.Suspended

4.All of the above


Question:
 After the cell has undergone mitosis the amount of DNA in daughter cells will be:

1.Equal to the parent cell

2. Half of the parent cell

3.Double of the parent cell

4.None of the above


Question:
 Albinism in plants is associated with:

1.Epistatis

2.Recessive lethal

3. Dominant lethal

4.Chromosome duplication


Question:
 An anticodonis a sequence of three nitrogenous bases found on:

1.DNA

2.mRNA

3.rRNA

4.tRNA


Question:
 An egg or sperm cell in plants is called:

1.Gene

2.Gamete

3.Zygote

4.None of them


Question:
 An organism having the gametic chromosome numbers is called as:

1.Genome

2.Hybrid

3.Gamete

4.Haploid


Question:
 An organism with one extra chromosome (2n + 1) is instead of the normal diploid (2n) is known as:

1.Monoploid

2.Monosomic

3.Trisomic

4.Tetrasonic


Question:
 At the stage of fully turgid cell the suction pressure will be:

1.Equal to wall pressure

2.Zero

3.Equal to osmotic pressure

4.Maximum


Question:
 ______ are examples of protandrous species:

1.Avocados

2.Walnuts

3.Carrots

4.None of these


Question:
 ______ deteriorates drastically upon inbreeding:

1.Carrot

2.Okara

3.Brinjal

4.Broccoli


Question:
 _______estimated that incompatibility occurs in more than 3000 species among 20 families of the flowering plants:

1.D. De Winton

2.M.B. Hughes

3.W.H. Gabelman

4.E.M. East


Question:
2n - 1 is a:

1.Monosomic

2.Transonic

3.Tetrasomic

4.Alloploid


Question:
A cell or an organism having one chromosome pair in addition to the normal somatic compliment of the species is:

1.Monosomic

2.Nullisomic

3.Tetrasomic

4.Trisomic


Question:
A character dermined by many genes and does not show discrete variation is known as:

1.Qualitative character

2. Oligogenic character

3.Quantitative character

4.Multiple-allelic character


Question:
A dry one chambered and one seeded fruit developing from a superior ovary with the hard and woody pericarp is:

1.Achene

2.Caryopsis

3.Composite fruit

4.None of the above


Question:
A head or capitulum s is characteristic of:

1.Compositeae

2.Umbelliferae

3.Solanaceae

4.Gramineae


Question:
A hybrid is always:

1.Heterozygous

2.Homozygous

3.Both of the above

4.Often homozygous


Question:
A large unit of natural vegetation in an area under identical condition (climatic) is called:

1.Plant formation

2.Association

3.Community

4.Climax


Question:
A maintainer line is:

1.Male fertile and can restore fertility

2.Male sterile but can restore fertility

3.Male sterile but cannot restore fertility

4.Male fertile but cannot restore fertility


Question:
A male gametophyte in angiosperms contains:

1.One gametes only two male gametes only

2.Two male gamete only

3.Two male gametes and one tube nucleusnucleus

4.One male gamete and one tube nucleus


Question:
A mendelian population means:

1.Self-pollinated population

2.Inbred population

3.Random-mating population

4.Hybrid population


Question:
A plant bearing both male and female flowers is said to be:

1.Dioecious

2.Monoecious

3.Polygamous

4.None of above


Question:
A plant with 2n = 20 will have how many linkage group:

1.20

2.10

3.40

4.5


Question:
A plant with genotype Gg Ww will produce gametes of which of the following types?

1.GW gw gWGw

2.GGWWggww

3.GwGGGW

4.All of them


Question:
A restorer gene is present in:

1.Nucleus

2.Cytoplasm

3.Both (a) & (b)

4.None of these


Question:
A state of meiotic cell division when homologous chromosomes separate and move to different poles is known as:

1.Metaphase I

2.Anaphase I

3.Telophase I

4.Anaphase II


Question:
Acclimatisation is:

1.A process of adjustment by crop plants to environment

2.Related with the clay

3.Removal of female parts of a flower

4.Changing of climatical condition


Question:
Actual petrified remains of ancient plants and animals or impressions left by them in rocks are called:

1.Fossils

2.Models

3.Traces

4.None of the above


Question:
Adjustment of individual to their environment by mean of special structures or of function of spoken of:

1.Mutation

2.Variation

3.Heredity

4.Adaptation


Question:
Adventitious roots grow from:

1.Radical

2.Plumule

3.Hypophysis

4.Any part of the plant body other than the radical


Question:
Alternative forms of a gene is known a: 

1.Mutation

2.Gamete

3.Allele

4.Genotype


Question:
An association can be:

1.Hydrophytic

2.Halophytic

3.Xerophytic

4.All of the above


Question:
An embryo sac of angiosperms generally contains:

1.Two nuclei

2.Three nuclei

3.Four nuclei

4.Eight nuclei


Question:
An endospermic cell of a seed after somatic chromosome number (2n = 20) will have:

1.30 Chromosomes

2.20 Chromosomes

3.10 Chromosomes

4.40 Chromosomes


Question:
Ascending portion of the axis of the plant developing directly from the plumule and bears leaves braches and flower is known as:

1.Root

2.Steam

3.Modified root

4.None of above


Question:
At the stage incipient plasmolysis the turgor pressure is:

1.Zero

2.2 atm.

3.4 atm.

4.22.4 atm.


Question:
ATP synthesis occurs in:

1.Chloroplast

2.Chloroplast and mitochondria

3.Chloroplast mitochomdria and muclei

4.Mitochondria


Question:
Bacteria protozoa and other living plants and animals are:

1.Climatic factors

2.Edaphic factors

3.Biotic factors

4.Topographic factors


Question:
Baldness in human being is a:

1.Sex linked character

2.Sex limited character

3.Sex-influenced character

4.None of the above


Question:
Barely is a ______ pollinated crop:

1.Often-cross

2.Self and cross

3.Cross

4.Self


Question:
Binomial system of Nomenclature means that the name of plant is made up of two words which designate:

1. Family and genus

2.Order and family

3.Species and family

4.Genus and species


Question:
Experiments in Plant Hybridization a paper of G. Mendal was first published in the year:

1.1905

2.1787

3.1866

4.1896


Question:
If a gene is represented in an infinitely large random-mating population by adaptively neutral alleles A and a in the ration of qA: (1-q)2 aa = 1 is known as:

1.Stanford-Suneson law

2.Weibe-Thomas law

3.Briggs-Harlan law

4.Hard-Weinberg law


Question:
Origin of Species by means of Natural Selection was given by:

1.Lamark

2.Linnaeus

3.Charles Darwin

4.Erasmus


Question:
Radish is an example of:

1.Fusiform root

2.Napiform root

3.Conical root

4.Tuberous root


Question:
Wind pollination is also known as:

1.Anemophyly

2.Entomophyly

3.Zoophyly

4.Hydrophyly


Question:
Zamikand and Taro (Colocasia) are example of:

1.Rhizome

2.Tuber

3.Bulb

4.Corm


Question:
_____ in Ladino clover is governed by two dominant alleles one produces cyanogenic glycoside while the other releases the enzyme to catalyze its release from gloycoside: 

1.Oxalic acid

2.IAA

3.HCN

4.NAA


Question:
_______provides the best documented example of long time effects of selection:

1.Sugarcane

2.Sweet sorghum

3.Sugarbeet

4.Sugar maple


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