Biology - Plant Physiology
Exam Duration: 45 Mins Total Questions : 30
For each molecules of glucose formed in plnats,the number of molecules of ATP and NADPH2 required are respecively
- (a)
18 and 12
- (b)
12 and 18
- (c)
15 and 10
- (d)
12 and 20
The overall goal of glycolysis, Krebs' cycle and the electron transport system is the formation of
- (a)
ATP in small stepwise units
- (b)
ATP in one large oxidation reaction
- (c)
Sugars
- (d)
nucleic acids
Gibberellins can promote seed germination because of their influence on
- (a)
rate of cell division
- (b)
gibberellic acid
- (c)
auxin
- (d)
anti-gibberellin
Leaf abscission is caused by
- (a)
ABA
- (b)
cytokinin
- (c)
auxin
- (d)
gibberellin
Select the match ones.
I. Nitrosomonas - Nitrate to nitrate
II. Thiobacillus - Denitrification
III. Nostoc - Free-living nitrogen-fixer
IV.Azotobacter - Anaerobic nitrogen-fixer
- (a)
I and II
- (b)
III and IV
- (c)
II and III
- (d)
II and IV
- (e)
I, II and III
Ribulose diphosphate carboxylase is located in
- (a)
Golgi bodies
- (b)
peroxysomes
- (c)
chloroplast
- (d)
mitochondria
Who proposed relay pump theory of the ascent of sap?
- (a)
JC Bose
- (b)
Godlewski and Westermaier
- (c)
Strasburger
- (d)
Sachs
Dark reaction of photosynthesis is called so because
- (a)
it can occur in dark also
- (b)
it does not directly depend on light energy
- (c)
it cannot occur during daylight
- (d)
it occurs more rapidly at night.
Cohesive force of water is due to
- (a)
O-bonds
- (b)
OH-bonds
- (c)
S-bonds
- (d)
H-bonds
The first experiment on photosynthesis by flashing light was performed by
- (a)
Robert Hill
- (b)
Melvin Calvin
- (c)
FF Blackman
- (d)
Emerson and Arnold
When ATP is converted into ADP, it releases
- (a)
enzymes
- (b)
energy
- (c)
Hormones
- (d)
glucose
Which of the following products of Hill reaction are used in Blackman's reaction ?
- (a)
ATP, NAD
- (b)
NAD, ADP
- (c)
ATP, NADP
- (d)
ATP, NADPH2
Enzymes of oxidative phosphorylation occurs in
- (a)
endoplasmic reticulum
- (b)
chloroplasts
- (c)
mitochondria
- (d)
Golgi bodies
Atmospheric pressure theory was rejected for the ascent of sap because
- (a)
there is no free surface at the lower end of the plant, which is necessary for the operation of atmospheric pressure
- (b)
maximum height to which water can rise is about 50 m
- (c)
movement of the water is very slow and negligi8ble and it forms only an infinitesimal small fraction of the total
- (d)
this is not useful in adhering water to the walls of the xylem elements
In decapitated plants, axillary buds are activated because
- (a)
auxin is made available to them
- (b)
more food material is available to them
- (c)
amount to cytokinin increase in them
- (d)
they get more light
The main mechanism (s) determining the direction of short distance transport within a potato tuber is (are)
- (a)
determined by the structure and function of the tonoplast of tuber cells
- (b)
diffusion due to concentration differences and bulk flow due to pressure differences
- (c)
not affected by temperature and pressure
- (d)
pressure flow through the phloem
If a long-day plant is grown under conditions of long nights and short-days and dark period interrupted in the middle by a brief exposure to red light, the plant will
- (a)
wilt
- (b)
flower
- (c)
drops its floral buds
- (d)
die
If only one leaf plant is given proper light treatment
- (a)
it may produce flowers
- (b)
it does not produce flower
- (c)
its flowering is delayed
- (d)
its flowering shall be scanty
In plants, nitrate is reduced to ammonia state in two steps. In second step, electrons are donated by
- (a)
ferredoxin
- (b)
nitrite reducase
- (c)
cytochrome-b5
- (d)
None of the above
Arrange root hair cell, inner cortical cell and mesophyll cell in ascending order of DPD.
- (a)
Mesophyll cell, root hair cell and cortical cell
- (b)
Cortical cell, mesophyll cell and root hair cell
- (c)
Root hair cell, cortical cell and mesophyll cell
- (d)
Root hair cell, mesophyll cell ad cortical cell
Read the following statements and choose the correct option
- (a)
Respiration is purely a catabolic process
- (b)
Reduction of food results in the release of energy
- (c)
Chemical energy is broken down during respiration to release energy
- (d)
Fungi can make their own food and derive the energy by respiration
(A) Assertion: The inner membrane of mitochondria contains systems involving electron transport.
(R) Reason: the mitochondrial matrix contains enzymes of Krebs cycle
- (a)
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
- (b)
If both (A) and (R) are correct, but (R) is not the correct explanation of (A)
- (c)
If (A) is correct but (R) is incorrect
- (d)
If (A) is incorrect but (R) is correct
During seed germination its stored food is mobilized by
- (a)
cytokinin
- (b)
ABA
- (c)
gibberellin
- (d)
ethylene
Water potential can be obtained by
- (a)
OP + TP
- (b)
OP = WP
- (c)
\(\Psi \)s + \(\Psi \)p
- (d)
OP-DPD
In tea plantations and hedge making, gardeners trim the plants regularly so that they remain bushy. Scientific explanation behind this is
- (a)
removal of apical dominance
- (b)
growth of lateral buds
- (c)
suppression of lateral buds
- (d)
both (a) and (b).
Refer to the given reaction. What does it depict?
- (a)
Oxidative amination
- (b)
Reductive amination
- (c)
Transamination
- (d)
Deamination
Auxins
- (a)
Were first isolated in agar by paal
- (b)
Are synthesised using tryptophan as precursor
- (c)
Are found always as bound with amines
- (d)
Are synthesised in shoot apices only
Select an incorrect match
- (a)
ABA-Violaxanthin
- (b)
Ethylene-Methionine
- (c)
GA3-Acetyl CoA
- (d)
Cytokinin-Terpenes
In C4 plants, first stable product of CO2 fixation is
- (a)
OAA
- (b)
RuBP
- (c)
3-PGA
- (d)
Malic Acid
Viviparous type of seed germination is found in
- (a)
Sonneratia
- (b)
Rhizophora
- (c)
Oryza sativa
- (d)
Both (1)&(2)