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Q.711
Easy
General Science
Botany
The process by which plants lose water as water vapour through stomata is called:
Correct Answer:
B. Transpiration
EXPLANATION
Transpiration is the loss of water vapour from aerial parts of plants, primarily through stomata during daytime.
Q.712
Easy
General Science
Botany
The phenomenon where plants bend towards light source is governed by which hormone?
Correct Answer:
B. Auxin
EXPLANATION
Auxin causes differential elongation of cells on the shaded side, resulting in phototropic response towards light.
Q.713
Easy
General Science
Botany
Which element is essential for the synthesis of chlorophyll molecule and forms the central atom in its structure?
Correct Answer:
B. Magnesium
EXPLANATION
Magnesium (Mg) is the central atom in the chlorophyll molecule, forming a coordinate bond with the porphyrin ring.
Q.714
Easy
General Science
Botany
The pH of cell sap in plant cells typically ranges between:
Correct Answer:
B. 4-6
EXPLANATION
Plant cell sap is slightly acidic due to organic acids like malic acid and citric acid, maintaining pH between 4-6.
Q.715
Easy
General Science
Botany
Which of the following is the primary pigment responsible for absorbing light energy in the visible spectrum during photosynthesis?
Correct Answer:
A. Chlorophyll a
EXPLANATION
Chlorophyll a is the primary photosynthetic pigment that absorbs light in the blue and red regions of the electromagnetic spectrum.
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Q.716
Easy
General Science
Human Body
Largest gland in human body?
Correct Answer:
C. Liver
EXPLANATION
Liver is largest gland.
Q.717
Easy
General Science
Human Body
Human body has how many bones?
Correct Answer:
B. 206
EXPLANATION
Adult body has 206 bones.
Q.718
Easy
General Science
Physics
Sound cannot travel through?
Correct Answer:
C. Vacuum
EXPLANATION
Sound needs medium, not vacuum.
Q.719
Easy
General Science
Biology
Powerhouse of cell?
Correct Answer:
C. Mitochondria
EXPLANATION
Mitochondria produces ATP.
Q.720
Easy
General Science
Physics
Ohm Law: V = ?
Correct Answer:
B. IR
EXPLANATION
V = I × R (Ohm Law).