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Question-1
In the genetic dictionary, there are 64 codons as
(A)
64 amino acids are to be coded
(B)
64 types of tRNAs are present
(C)
there are 44 nonsense codons and 20 sense
codons
(D)
genetic code is triplet.
Question-2
Diploid chromosome number in human is
(A)
46
(B)
44
(C)
48
(D)
42
Question-3
Because most of the amino acids are represented by more than one codon, the genetic code is
(A)
overlapping
(B)
wobbling
(C)
degenerate
(D)
generate
Question-4
Out of 8 ascospore formed in
Neurospora
the arrangment is 2a: 4a: 2a showing
(A)
no crossing over
(B)
some meiosis
(C)
second generation division
(D)
first generation division.
Question-5
Radio-tracer technique shows that DNA is in
(A)
multi-helix stage
(B)
single-helix stage
(C)
double-helix stage
(D)
none of these
Question-6
Khorana first deciphered the triplet codons of
(A)
serine and isoleucine
(B)
cysteine and valine
(C)
tyrosine and tryptophan
(D)
phenylalanine and methinonine
Question-7
During DNA replication, the strands separate by
(A)
DNA polymerase
(B)
topoisomerase
(C)
unwindase/helicase
(D)
gyrase
Question-8
Haploids are able to express both recessive and dominant alleles/mutations because there are
(A)
many alleles for each gene
(B)
two alleles for each gene
(C)
only one allele for each gene in the individual
(D)
only one allele in a gene.
Question-9
Genetic code consists of
(A)
adenine and guanine
(B)
cytosine and uracil
(C)
cytosine and guanine
(D)
all the above
Question-10
The process of translation is
(A)
ribosome synthesis
(B)
protein synthesis
(C)
DNA synthesis
(D)
RNA synthesis
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Plus 2 Biology Science
CBSE
Practice in Related Chapters
Plant Reproduction
Animal Tissue
Kingdom Monera
Plant Kingdom
Biological Classification
General Biology
Respiratory System
Digestive System And Nutrition
Circulatory System and Immunity
Plant Morphology
Plant Anatomy
Cell Reproduction
Human Genetics & Genetic Disorders
Mendelian & Postmendelian Genetics
Genes & Chromosomes
Biomolecules
Enzymes
Cell Respiration
Cell Respiration
Kingdom Fungi
Aging And Death
Common Human Diseases
Evolution
Drug And Addiction
Reproduction And Embryonic Development
Endocrine System
Excretion And Osmoregulation
Nervous System & Sense Organs
Musculo-Skeletal System
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