1. Which one of the following statement is not true regarding gel electrophoresis technique?
(1) The presence
of chromogenic substrate gives blue coloured DNA bands on the gel.
(2) Bright orange
coloured bands of DNA can be observed in the gel when exposed to UV light.
(3) The process
of extraction of separated DNA strands from gel is called elution.
(4) The separated
DNA fragments are stained by using ethidium bromide.
2. Given below are two statements :
Statement I :
Mendel studied
seven pairs of contrasting traits in pea plants and proposed the Laws of
Inheritance.
Statement II :
Seven characters
examined by Mendel in his experiment on pea plants were seed shape and colour,
flower colour, pod shape and colour, flower position and stem height.
In the light of
the above statements, choose the correct answer from the options given below :
(1) Statement I
is correct but Statement II is incorrect
(2) Statement I
is incorrect but Statement II is correct
(3) Both
Statement I and Statement II are correct
(4) Both
Statement I and Statement II are incorrect
3. Which of the following is incorrectly matched?
(1) Porphyra –
Floridian Starch
(2) Volvox –
Starch
(3) Ectocarpus –
Fucoxanthin
(4) Ulothrix –
Mannitol
4. XO type of sex determination can be found in :
(1) Grasshoppers
(2) Monkeys
(3) Drosophila
(4) Birds
5. The appearance of recombination nodules on homologous
chromosomes during meiosis characterizes :
(1) Sites at
which crossing over occurs
(2)
Terminalization
(3) Synaptonemal
complex
(4) Bivalent
6. Which of the following is not a method of ex situ conservation?
(1)
Micropropagation
(2)
Cryopreservation
(3) In vitro
fertilization
(4) National
Parks
7. Identify the incorrect statement related to Pollination :
(1) Flowers
produce foul odours to attract flies and beetles to get pollinated
(2) Moths and
butterflies are the most dominant pollinating agents among insects
(3) Pollination
by water is quite rare in flowering plants
(4) Pollination
by wind is more common amongst abiotic pollination
8. Given below are two statements :
Statement I :
The primary CO2 acceptor
in C4 plants is phosphoenolpyruvate and is found in the mesophyll cells.
Statement II :
Mesophyll cells
of C4 plants lack RuBisCo enzyme. In the light of the above statements, choose
the correct
Ans: from the
options given below:
(1) Statement I
is correct but Statement II is incorrect
(2) Statement I
is incorrect but Statement II is correct
(3) Both
Statement I and Statement II are correct
(4) Both
Statement I and Statement II are incorrect
9. In old trees the greater part of secondary xylem is dark brown
and resistant to insect attack due to :
(a) secretion of
secondary metabolities and their deposition in the lumen of vessels.
(b) deposition of
organic compounds like tannins and resins in the central layers of stem.
(c) deposition of
suberin and aromatic substances in the outer layer of stem.
(d) deposition of
tannins, gum, resin and aromatic substances in the peripheral layers of stem.
(e) presence of
parenchyma cells, functionally active xylem elements and essential oils.
Choose the correct answer from the options given below:
(1) (d) and (e)
Only
(2) (b) and (d)
Only
(3) (a) and (b)
Only
(4) (c) and (d)
Only
10. Which one of the following produces nitrogen fixing nodules on
the roots of Alnus?
(1)
Rhodospirillum
(2) Beijerinckia
(3) Rhizobium
(4) Frankia
11. Given below are two statements:
Statement I: Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement II: Decomposition is faster if the detritus is rich in
lignin and chitin.
In the light of the above statements, choose the correct answer
from the options given below:
(1) Statement I
is correct but Statement II is incorrect
(2) Statement I
is incorrect but Statement II is correct
(3) Both
Statement I and Statement II are correct
(4) Both
Statement I and Statement II are incorrect
12. Habitat loss and fragmentation, over exploitation, alien
species invasion and co-extinction are causes for:
(1) Biodiversity
loss
(2) Natality
(3) Population
explosion
(4) Competition
13. Hydrocolloid carrageen is obtained from:
(1) Rhodophyceae
only
(2) Phaeophyceae
only
(3) Chlorophyceae
and Phaeophyceae
(4) Phaeophyceae
and Rhodophyceae
14. “Girdling Experiment” was performed by Plant Physiologists to
identify the plant tissue through which:
(1) for both
water and food transportation
(2) osmosis is
observed
(3) water is
transported
(4) food is
transported
15. The flowers are Zygomorphic in:
(a) Mustard
(b) Gulmohar
(c) Cassia
(d) Datura
(e) Chilly
Choose the correct Ans: from the options given below:
(1) (d), (e) Only
(2) (c), (d), (e)
Only
(3) (a), (b), (c)
Only
(4) (b), (c) Only
16. Which one of the following is not true regarding the release
of energy during ATP synthesis through chemiosmosis? It involves:
(1) Movement of
protons across the membrane to the stroma
(2) Reduction of
NADP to NADPH2 on the stroma side of the membrane
(3) Breakdown of
proton gradient
(4) Breakdown of
electron gradient
17. The device which can remove particulate matter present in the
exhaust from a thermal power plant is :
(1) Electrostatic
Precipitator
(2) Catalytic
Convertor
(3) STP
(4) Incinerator
18. Given below are two statements : one is labelled as
Assertion (A) and
the other is labelled as Reason (R).
Assertion (A) :
Polymerase chain
reaction is used in DNA amplification.
Reason (R) :
The ampicillin
resistant gene is used as a selectable marker to check transformation
In the light of
the above statements, choose the correct Ans: from the options given below :
(1) (A) is
correct but (R) is not correct
(2) (A) is not
correct but (R) is correct
(3) Both (A) and
(R) are correct and (R) is the correct explanation of (A)
(4) Both (A) and
(R) are correct but (R) is not the correct explanation of (A)
19. Which one of the following plants does not show plasticity?
(1) Buttercup
(2) Maize
(3) Cotton
(4) Coriander
20. The process of translation of mRNA to proteins begins as soon
as :
(1) Both the
subunits join together to bind with mRNA
(2) The tRNA is
activated and the larger subunit of ribosome encounters mRNA
(3) The small
subunit of ribosome encounters mRNA
(4) The larger
subunit of ribosome encounters mRNA
21. Read the following statements and choose the set of correct
statements :
(a) Euchromatin
is loosely packed chromatin
(b) Heterochromatin
is transcriptionally active
(c) Histone
octomer is wrapped by negatively charged DNA in nucleosome
(d) Histones are
rich in lysine and arginine
(e) A typical
nucleosome contains 400 bp of DNA helix
Choose the correct Ans: from the options given below :
(1) (b), (e) Only
(2) (a), (c), (e)
Only
(3) (b), (d), (e)
Only
(4) (a), (c), (d)
Only
Ans: (4)
22. Read the following statements about the vascular bundles :
(a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.
(b) Conjoint
closed vascular bundles do not possess cambium
(c) In open
vascular bundles, cambium is present in between xylem and phloem
(d) The vascular
bundles of dicotyledonous stem possess endarch protoxylem
(e) In
monocotyledonous root, usually there are more than six xylem bundles present
Choose the correct Ans: form the options given below :
(1) (a), (b), (c)
and (d) Only
(2) (a), (c), (d)
and (e) Only
(3) (a), (b) and
(d) Only
(4) (b), (c), (d)
and (e) Only
23. Exoskeleton of arthropods is composed of :
(1) Chitin
(2) Glucosamine
(3) Cutin
(4) Cellulose
24. What is the net gain of ATP when each molecule of glucose is
converted to two molecules of pyruvic acid?
(1) Two
(2) Eight
(3) Four
(4) Six
25. Which of the following is not observed during apoplastic
pathway ?
(1) The movement
is aided by cytoplasmic streaming
(2) Apoplast is
continuous and does not provide any barrier to water movement.
(3) Movement of
water occurs through intercellular spaces and wall of the cells.
(4) The movement
does not involve crossing of cell membrane
Answers:
1. (1) The presence of chromogenic substrate gives blue coloured DNA bands on the gel.
2. (3) Both Statement I and Statement II are correct
3. (4) Ulothrix – Mannitol
4. (4) Birds
5. (1) Sites at which crossing over occurs
6. (4) National Parks
7. (2) Moths and butterflies are the most dominant pollinating agents among insects
8. (3) Both Statement I and Statement II are correct
9. (3) (a) and (b) Only
10. (4) Frankia
11. (1) Statement I is correct but Statement II is incorrect
12. (1) Biodiversity loss
13. (1) Rhodophyceae only
14. (4) food is transported
15. (4) (b), (c) Only
16. (4) Breakdown of electron gradient
17. (1) Electrostatic Precipitator
18. (4) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
19. (2) Maize
20. (3) The small subunit of ribosome encounters mRNA
21.(4) (a), (c), (d) Only
22. Ans: (NA)
23. (1) Chitin
24.(1) Two
25. (1) The movement is aided by cytoplasmic streaming