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Question-1
Experimental material in the study of DNA replication has been
(A)
Escherichia coli
(B)
Neurospora crassa
(C)
Pneumococcus
(D)
Drosophila melanogaster.
Question-2
Sex is determined in human beings
(A)
by ovum
(B)
at time of fertilization
(C)
40 days after fertilization
(D)
seventh to eight week when genitals differentiate in foetus
Question-3
The eukaryotic genome differs from the prokaryotic genome because
(A)
the DNA is complexed with histone in prokaryotes
(B)
the DNA is circular and single stranded in prokaryotes
(C)
repetitive sequences are present in eukaryotes
(D)
genes in the former case are organized into operons
Question-4
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental of coupling type alongwith its cross over or repulsion
(A)
coupling AABB, aabb; Repulsion AABB, aabb
(B)
coupling AAbb, aaBB; Repulsion AaBb, aabb
(C)
coupling aaBB, aabb; Repulsion AABB, aabb
(D)
coupling AABB. aabb: Repulsion AAbb,
aaBB.
Question-5
Which of the following occurs more than one and less than five in a chromosome?
(A)
chromatid
(B)
chromosome
(C)
centromere
(D)
telomere
Question-6
In protein synthesis, the polymerization of amino acids involves three steps. Which one of the following is not involved in the polymerisation of
protein ?
(A)
termination
(B)
initiation
(C)
elongation
(D)
transcription
Question-7
Barr body in mammals represents
(A)
all the heterochromatin in male and female
cells
(B)
the Y-chromosome in somatic cells of male
(C)
all the heterochromatin in female cells
(D)
one of the two X-chromosomes in somatic
cells of females
Question-8
The polytene chromosomes were discovered for the first time in
(A)
Drosophila
(B)
Musca domestica
(C)
Chironomus
(D)
Musca nebula
Question-9
The transforming principle of
pneumococcus
as found out by Avery, MacLeod and McCarty was
(A)
mRNA
(B)
DNA
(C)
protein
(D)
polysaccharide.
Question-10
The point, at which polytene chromosome appear to be attached together, is called
(A)
centromere
(B)
chromomere
(C)
chromocentre
(D)
centriole
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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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