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Home » GAT Subject » Agriculture » Aptitude Test - 10
1.A condition in which pollination and fertilization take place in an unopened flower is termed as:
A. Homogamy
B. Apogamy
C. Polygamy
D. Homogamy
2.A criss-cross inheritance is shown by:
A. Sex-influenced character
B. Polygamy
C. Sex-linked character
D. Sex-influenced character
3.A cybrid is:
A. A sex hybrid
B. A hybrid formed by cell fusion
C. A plant produced by cell culture
D. A sex hybrid
4. A dry, one chambered and one seeded fruit developing from a superior ovary with the hard and woody pericarp is:
A. Achene
B. Caryopsis
C. Composite fruit
D. Achene
5.A fruit, which develops from an inflorescence, is known as:
A. Simple fruit
B. Aggregate fruit
C. Composite fruit
D. Simple fruit
6. A fruit, which is collection of simple fruits developing from the apocarpous pistil of a flower, is known as:
A. Multiple fruit
B. Aggregate fruit
C. Complex fruit
D. Multiple fruit
7.DNA model was studied with help of x-rays by:
A. Wilkins
B. Watson
C. Crick
D. Wilkins
8.Cenetic information is encoded in the structure of which of these:
A. Enzymes
B. DNA
C. Structure proteins
D. Enzymes
9.Theory of one gene - one enzyme was proposed by:
A. Watson and Crick
B. Beadle and Tatum
C. Scleiden and Schwann
D. Watson and Crick
10.Central dogma of molecular genetics is:
A. DNA - RNA - Proteins
B. RNA - DNA - Proteins
C. Proteins - DNA - RNA
D. DNA - RNA - Proteins
11.Five major types of histones are:
A. H1, H2, H3, H4 and H5
B. H1, H2a, H2b, H3 and H4
C. H1a, H1b, H2a, H2b and H3
D. H1, H2, H3, H4 and H5
12.Genes are made up:
A. Histones
B. Polynucleotides
C. Hydrocarbons
D. Histones
13.Term gene refers to:
A. A portion of DNA
B. A portion of RNA
C. Both (a) & (b)
D. A portion of DNA
14.Which of these is carrier of genetic information:
A. tRNA
B. DNA
C. mRNA
D. tRNA
15.Nucleic acid was discovered by:
A. Miescher
B. Sutton
C. Khorana
D. Miescher
16.Chromosomes are made up of:
A. DNA and RNA
B. RNA and proteins
C. DNA, RNA and proteins
D. DNA and RNA
17. Dr. Khorana got Nobel Prize for his researches on:
A. Hormones
B. Immunology
C. Genetic Code
D. Hormones
18.Biochemical nature of gene was established by:
A. Avery and Macleod
B. Avery, Macleod and McCarty
C. Jacob and Monad
D. Avery and Macleod
19. Nucleosomes are beaded structure on chromosomes and formed of:
A. DNA and histones
B. RNA and histones
C. RNA and proteins
D. DNA and histones
20.Beads in chromosomes are formed by:
A. DNA molecule taking one turn
B. DNA molecule taking two turn
C. RNA molecule taking one turn
D. DNA molecule taking one turn
21.The places in between beads of nucleosomes in chromosomes, where DNA is straight, are termed:
A. Speacers
B. Linkers
C. Both (a) & (b)
D. Speacers
22.An individual with two identical members of a pan or genetic factors is called:
A. Heterozygote
B. Homozygote
C. Hybrid
D. Heterozygote
23.Genetic mutations occur in:
A. Chromosomes
B. DNA
C. RNA
D. Chromosomes
24.X-rays cause mutations by:
A. Altering the chromosome structure
B. Routing the nuclear membrane
C. Breaking the spindle
D. Altering the chromosome structure
25.A functional units of gene which specifies the synthesis of polypeptide is called:
A. Clone
B. Recon
C. Cistron
D. Clone
26.Nucleosomes are the unit of:
A. DNA
B. RNA
C. Proteins
D. DNA
27. Unusual method of DNA duplication is called:
A. Semiconservative
B. Nonconservative
C. Conservative
D. Semiconservative
28. Mutations are harmful:
A. Always
B. Never
C. Rarely
D. Always
29.A zygote has which of these number of chromosomes:
A. x
B. 2x
C. 3x
D. x
30. In chromosomes the material controlling heredity is:
A. Histones
B. DNA
C. Chromocentres
D. Histones
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