Questions
What are morphactins?
- Growth retardants
- Synthetic growth regulators
- Phytochromes
- Synthetic enzymes
EDTA is commonly used in tissue culture media. It is
- a vitamin necessary for the increased growth of cells
- a hormone required to trigger cell division
- an enzyme to help in the absorption of nutritive substances
- a chelating agent used to keep the important elements in suspension
The rosette habit of cabbage can be changed drastically to vine by the application of
- IAA
- GA
- CK
- ABA
Which of the following physiological effects is caused by gibberellic acid in plants?
- Shortening of genetically tall plants
- Rooting in stem cutting
- Elongation of genetically dwarf plants
- Yellowing of young leaves
Directions: The question consists of two statements: Assertion and Reason. While answering the question you are required to choose any of the following five responses.<o:p>
(A) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion;
(B) If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion;
(C) If Assertion is true, but the Reason is false;
(D) If Assertion is false and Reason is true;
(E) If both Assertion and Reason are false.
Assertion: Glycolysis begins in the cytoplasm, resulting into two C-3 intermediates, then rearranges further to yield two molecules of pyruvate.
Reason: During glycolysis, four ATP and two NADPH molecules are produced and the net yield is only two ATP molecules.
- (A)
- (B)
- (C)
- (D)
If the CO2 content of atmosphere is as high as 300 parts per million, then
- all plants would be killed
- growth of plants would get stunted
- the plants would thrive well
- plants would grow for sometime and then die
Ribulose–1, 5 diphosphate carboxylase is the initial enzyme of
- Krebs cycle
- glycolysis
- Calvin’s cycle
- light reaction
What is the reason for the appearance of drought spots in apples?
- Nitrogen deficiency
- Boron deficiency
- Hydrogen deficiency
- Potassium deficiency
Excess of which one of the following acts as an anti-transpirant?
- N2
- CO2
- SO2
- O2
Assertion (A): Of the wide range of wavelengths in the electromagnetic spectrum, plants can use only visible light for photosynthesis.
Reasoning(R): About 48% of the energy in solar radiation reaching plants is in the form of ultraviolet and infrared light and these are not used in photosynthesis.
- Both Assertion and Reasoning are true and R is the correct explanation of A.
- Both Assertion and Reasoning are true and R is not the correct explanation of A.
- A is true and R is false.
- Both A and R are false.
Directions: The question consists of two statements: Assertion and Reason. While answering this question, you are required to choose any one of the following five responses.
(A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion;
(B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion;
(C) If Assertion is true but Reason is false;
(D) If Assertion is false but Reason is true;
(E) If both Assertion and Reason are false.
Assertion (A): Both blue and red lights are used directly for light reactions of photosynthesis.
Reason (R): The absorption spectrum represents the graph plotted between the amount of CO2 consumed and different wavelengths of light absorbed by the same pigment.
- (A)
- (B)
- (C)
- (D)
<u><strong>Directions:</strong></u> The question consists of two statements : Assertion and Reason. While answering the question you are required to choose any one of the following five responses.
(A) If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
(B) If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
(C) If Assertion is true but the Reason is false.
(D) If Assertion is false and Reason is true.
(E) If both Assertion and Reason are false.
Assertion: C4 plants are capable of photosynthesizing under very low CO2 concentration.
Reason: RuBP carboxylase is present in them.
- A
- B
- C
- D