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Question-1
Which one of the following discoveries resulted in a Nobel Prize?
(A)
X-rays induce sex-linked recessive lethal mutations
(B)
Cytoplasmic inheritance
(C)
Recombination of linked genes
(D)
Genetic engineering
Question-2
The tailed Bacteriophages are
(A)
Motile on surface of bacteria
(B)
Non-motile
(C)
Motile on surface of plant leaves
(D)
Actively motile in water
Question-3
The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for
(A)
Interaction with the environment and
progressive evolution
(B)
Reproduction
(C)
Growth and movement
(D)
Responsiveness to touch
Question-4
Which of the following is an example of negative feedback loop in humans
(A)
Secretion of tears after falling of sand particles into the eye
(B)
Salivation of mouth at the sight of delicious food
(C)
Secretion of sweat glands and constriction of skin blood vessels when it is too hot
(D)
Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold
Question-5
A self-fertilizing trihybrid plant forms
(A)
8 different gametes and 64 different zygotes
(B)
4 different gametes and 16 different zygotes
(C)
8 different gametes and 16 different zygotes
(D)
8 different gametes and 32 different zygotes.
Question-6
H.J. Muller had received Nobel Prize for
(A)
His studies on Drosophila for genetic study
(B)
proving that the DNA is a genetic material
(C)
Discovering the linkage of genes
(D)
discovering the induced mutations by X-rays
Question-7
Flagella of prokaryotic and eukaryotic cells differ
in
(A)
Type of movement and placement in cell
(B)
Location in cell and mode of functioning
(C)
Micro tubular organization and type of movement
(D)
Micro tubular organization and function.
Question-8
Koch’s postulates are not applicable to
(A)
Diphtheria
(B)
Cholera
(C)
TB
(D)
Leprosy
Question-9
Maximum absorption of light occurs in the region of
(A)
1000- 1200 nm
(B)
1500 -2000 nm
(C)
400 - 700 nm
(D)
700 - 900 nm
Question-10
. Due to discovery of which of the following in 1980, the evolution was termed as RNA world
(A)
m—RNA, t-RNA, r-RNA synthesis proteins
(B)
in some viruses RNA is genetic material
(C)
RNA has enzymatic property
(D)
RNA is not found in all cells.
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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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