Biology

Biology - general knowledge

Question 1
Plants absorb dissolved nitrates from soil and convert them into
A
free nitrogen
B
urea
C
ammonia
D
proteins






Question 2
Pollination is best defined as
A
transfer of pollen from anther to stigma
B
germination of pollen grains
C
growth of pollen tube in ovule
D
visiting flowers by insects
Question 3
Myopia is connected with
A
ears
B
eyes
C
lungs
D
None of these






Question 4
Plants are killed in winter by frost
A
because of desiccation and mechanical damage to the tissues
B
because no photosynthesis takes place at such low temperature
C
because respiration ceases at such low temperature
D
because there is no transpiration
Question 5
Mutation is
A
a factor responsible for plant growth
B
a change which affects the offspring of F2 generation only
C
a change that is inherited
D
a change which affects the parents






Question 6
One of the following is not a function of bones.
A
Place for muscle attachment
B
Protection of vital organs
C
Secretion of hormones for calcium regulation in blood and bones
D
Production of blood corpuscles
Question 7
Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
A
flavoxanthin
B
melanin
C
carotene
D
Xanthophyll






Question 8
Other than spreading malaria, anopheles mosquitoes are also vectors of
A
dengue fever
B
filariasis
C
encephalitis
D
yellow fever
Question 9
out of proteins, lipids and carbohydrates present in a cell membrane, what is true?
A
Lipids are maximum
B
Carbohydrates are minimum
C
Carbohydrates are maximum
D
All three are in equal proportion






Question 10
Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?
A
Order
B
Subspecies
C
Class
D
Genus
Question 11
Organic Substances which, in very small amounts, control growth and development called
A
vitamins
B
hormones
C
enzymes
D
None of the above






Question 12
On which of the following plants did Gregor Mendal perform his classical experiment?
A
Gram
B
Maize
C
Pea
D
Wheat
Question 13
Pigmentation of skin is due to
A
lymphocytes
B
monocytes
C
leucocytes
D
melanocytes






Question 14
Photosynthesis takes place faster in
A
yellow light
B
white light
C
red light
D
darkness
Question 15
Photo-oxidation is
A
photorespiration
B
photolysis
C
light and oxygen induced breakdown
D
All of the above






Question 16
Plant bends towards the source of light on account of the movement of curvature known as
A
geotropism
B
thigmotropism
C
chemotropism
D
phototropism
Question 17
Most common disease of poultry in India is
A
fowl pox
B
tick fever
C
ranikhet
D
coryza






Question 18
Plants absorb most part of water needed by them through their
A
embryonic zone
B
growing point
C
root hairs
D
zone of elongation
Question 19
Radioactivity is a phenomenon of the spontaneous emission of
A
protons (alpha particles)
B
electrons (beta particles)
C
gamma rays (short wave electromagnetic waves)
D
All of the above






Question 20
Rain water helps to increase the ..... to some extent.
A
phosphorous contents
B
nitrogen contents
C
calcium contents
D
potash contents
Question 21
Most of the red, blue and purple colours of plants are due to a pigment called
A
anthocyanin
B
carotene
C
chlorophyll
D
xanthophylls
Question 21 Explanation: 
Anthocyanin - A blue, violet, or red flavonoid pigment found in plants.






Question 22
Plants synthesis protein from
A
starch
B
sugar
C
amino acids
D
fatty acids
Question 23
Night blindness is cause by lack of which vitamin?
A
Vitamin A
B
Vitamin B
C
Vitamin C
D
Vitamin D






Question 24
Plants that grow in saline water are called
A
halophytes
B
hydrophytes
C
mesophytes
D
thallophytes
Question 25
Photosynthesis generally takes place in which parts of the plant?
A
Leaf and other chloroplast bearing parts
B
stem and leaf
C
Roots and chloroplast bearing parts
D
Bark and leaf






Question 26
O2 released in the process of photosynthesis comes from
A
CO2
B
water
C
sugar
D
pyruvic acid
Question 27
Plants that grow under average temperature and moisture are called
A
halophytes
B
hydrophytes
C
mesophytes
D
xerophytes






Question 28
Plants hormone that induces cell division is
A
auxins
B
gibberellins
C
kinins
D
domins
Question 29
Pollen grains in plants are produced in
A
roots
B
leaves
C
flower
D
stem






Question 30
Norepinephrine increases
A
respiration
B
urine production
C
saliva production
D
blood pressure
Question 31
Movements due to light are shown by
A
flowering plants
B
lower plants
C
all land plants
D
all the plants






Question 32
Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
A
angiosperms
B
gymnosperms
C
monocotyledons
D
dicotyledons
Question 33
Mumps is a disease caused by
A
fungus
B
bacterium
C
virus
D
None of these
There are 33 questions to complete.

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