1 - A functional units of gene which specifies the synthesis of polypeptide is called:
Cistron
2 - A zygote has which of these number of chromosomes:
2x
3 - Amount of DNA in all cell of body is:
Constant
4 - An individual with two identical members of a pan or genetic factors is called:
Homozygote
5 - An operon is constituted by:
All of these
6 - Beads in chromosomes are formed by:
DNA molecule taking two turn
7 - Biochemical nature of gene was established by:
Avery, Macleod and McCarty
8 - Cenetic information is encoded in the structure of which of these:
DNA
9 - Central dogma of molecular genetics is:
RNA - DNA - Proteins
10 - Chromosomal theory of inheritance was given by:
Sutton
11 - Chromosomal theory of linkage was given by:
Morgan
12 - Chromosomes are made up of:
DNA, RNA and proteins
13 - Crossing over which means an exchange of segments between members of a homologous pair of chromosomes occurs during:
Meiosis
14 - Distance between two genes upon a chromosome is measured in cross over units which represent:
Percentage of crossing between them
15 - DNA model was studied with help of x-rays by:
Watson and Crick
16 - Dr. Khorana got Nobel Prize for his researches on:
Genetic Code
17 - Five major types of histones are:
H1, H2, H3, H4 and H5
18 - Genes are made up:
Histones
19 - Genetic mutations occur in:
DNA
20 - In chromosomes the material controlling heredity is:
DNA
21 - In eukaryotes the regulation of genes involves:
Both (a) & (b)
22 - In Morgan's experiment on linkage the recombinant types of test cross with F1, hybrids of gray body long winged and black body vestigial winged parents are:
Both (a) & (b)
23 - In negative regulation which of these gene of operon is involved:
Regulator
24 - In positive regulation which of these genes are involved:
Promotor
25 - In test cross between hybrids of F1 generation of gray body long winged and black body vestigial winged parents Morgan found which of these ratios:
46:37:8:9
26 - Linkage is:
Tendency of two genes to remain together during process of inheritance
27 - Linkage was first suspected by:
Sutton and Boveri
28 - Mutations are harmful:
Always
29 - Nucleic acid was discovered by:
Miescher
30 - Nuclein from nuclei of pus cells was separated by:
Miescher
31 - Nucleosomes are beaded structure on chromosomes and formed of:
DNA and histones
32 - Nucleosomes are the unit of:
Chromosomes
33 - Percentage of recombinant types in Morgan's experiment was:
0.17
34 - Promotor gene is stimulated to interact with RNA polymerase on interacting with:
CAP - cAMP
35 - Spacer in chromosomes is associated with:
H1
36 - Sperms do not have histones but they have
A basic protein protamine
37 - Sutton and Boveri are associated with:
Chromosomal theory of inheritance
38 - Term gene refers to:
A portion of DNA
39 - The places in between beads of nucleosomes in chromosomes, where DNA is straight, are termed:
Both (a) & (b)
40 - Theory of one gene - one enzyme was proposed by:
Beadle and Tatum
41 - Unusual method of DNA duplication is called:
Semiconservative
42 - Which of these do not code for proteins:
Both (a) & (b)
43 - Which of these in operon inhibits transcription of mRNA on combining with repressor protein:
Regulator gene
44 - Which of these is carrier of genetic information:
DNA
45 - X-rays cause mutations by:
Routing the nuclear membrane
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