Neet
·
1) Assertion:
C4
pathway of
CO2
fixation is found in some tropical plants. Reason : In this
pathway
CO2
is fixed by 3C compound [AIIMS 1998]
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
2) Assertion: Six molecules of
CO2
and twelve molecules of
NADPH++H+
and 18 ATP are used to form one hexose molecule. Reason : Light
reaction results in formation of
ATP
and
NADPH2
[AIIMS 2002]
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
3) Assertion: Rhoeo leaves contain anthocyanin pigments in
epidermal cells. Reason: Anthocyanins are accessory photosynthetic pigments.
[AIIMS 2003]
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
4) Assertion: There is a decrease in photosynthesis, if the
photosynthetic cells are illuminated by light of
P680
nm or more wavelength. Reason: In red drop phenomenon the rate of
photosynthesis decreases.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
5) Assertion: The concentration of
O2
in the atmosphere is inhibitory to photosynthesis. Reason: Oxygen
inhibitory effect is due to Warburg effect.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
6) Assertion: If
CO2
is increasing continuously, there will be a increase in
photosynthesis. Reason:
CO2
is the main substrate of photosynthesis?
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
7) Assertion: CAM plants lack structural compartmentation of leaf,
as found in
C4
plants. Reason: Stomata of CAM plants are open during the day.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
8) Assertion: Plants utilizing first RuBP in
CO2
fixations are called
C3
plants. Reason: Plants utilizing first PEP in
CO2
fixations are called
C4
plants.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
9) Assertion: Cyclic pathway of photosynthesis first appeared in
some eubacterial species. Reason: Oxygen started accumulating in the atmosphere
after the non-cyclic pathway of photosynthesis evolved. [AIIMS 2004]
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
10) Assertion: The stromal thylakoids are rich in both PS I and PS
II. Reason: The granal membranes are rich in ATP synthetase.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
11) Assertion: Cyclic photophosphorylation synthesizes ATP. Reason:
ATP synthesise in cyclic photophosphorylation is not associated with NADPH
formation.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
12) Assertion: Oxidative phosphorylation requires oxygen. Reason:
Oxidative photophosphorylation occurs in mitochondria.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
13) Assertion: Each molecule of ribulose-1, 5-bisphosphate fixes
one molecule of
CO2
. Reason: Three molecules of NADPH and two ATP are required for
fixation of one molecule of
CO2
.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
14) Assertion:
CO2
is transported from mesophyll cells to bundle sheath of
chloroplasts in
C4
plants. Reason: RuBP is called final acceptor of
CO2
in
C4
plants.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
15) Assertion: One molecule of
CO2
is fixed to give 686 kcal in photosynthesis. Reason: To form
a hexose, six molecules of
CO2
are fixed.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
16) Assertion: In the formation of one glucose, 686,000 calories
energy are produced. Reason: The energy is provided by a total of 12 NADPH and
18 ATP.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
17) Assertion: Sciophytes require higher light intensity than
heliophytes. Reason: Sciophytes grow below the canopy of trees.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
18) Assertion: The movement of photosynthates is unidirectional. Reason:
Movement of photosynthates occurs with the water.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
19) Assertion: Plants utilize 5-10% of the absorbed water in
photosynthesis. Reason: Reduced leaf hydration decrease the photosynthesis.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
20) Assertion: Photorespiration is completed in three cell
organelles. Reason: Peroxisomes, glyoxysomes and desmosomes are involved in
photorespiration.
A)
If both the assertion and the reason are true and the reason is a correct
explanation of the assertion
B)
If both the assertion and reason are true but the reason is not a correct
explanation of the assertion
C)
If the assertion is true but the reason is false
D)
If both the assertion and reason are false
E)
If the assertion is false but reason is true
·
21) Assertion: The atmospheric concentration of
CO2
at which photosynthesis just compensates for respiration is
referred to as
CO2
compensation point. Reason: The
CO2
compensation point is reached when the amount of
CO2
uptake is less than that generated through respiration because the
level of
CO2
in the atmosphere is more than that required for
achieving
CO2
compensation point.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
·
22) Assertion:
C4
photosynthetic pathway is more efficient than the
pathway. Reason: Photorespiration is suppressed in
C4
plants.
A) If both the
assertion and the reason are true and the reason is a correct explanation of
the assertion
B) If both the
assertion and reason are true but the reason is not a correct explanation of
the assertion
C) If the assertion is
true but the reason is false
D) If both the
assertion and reason are false
E) If the assertion is
false but reason is true
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