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Q.1921
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.1922
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.1923
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.1924
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.
Q.1925
Easy
General Science
Human Body
Largest gland in human body?
Correct Answer:
C. Liver
EXPLANATION
Liver is largest gland.
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Q.1926
Easy
General Science
Human Body
Human body has how many bones?
Correct Answer:
B. 206
EXPLANATION
Adult body has 206 bones.
Q.1927
Medium
General Science
Human Body
Universal blood donor group?
Correct Answer:
D. O-
EXPLANATION
O- has no antigens, universal donor.
Q.1928
Easy
General Science
Physics
Sound cannot travel through?
Correct Answer:
C. Vacuum
EXPLANATION
Sound needs medium, not vacuum.
Q.1929
Easy
General Science
Biology
Powerhouse of cell?
Correct Answer:
C. Mitochondria
EXPLANATION
Mitochondria produces ATP.
Q.1930
Easy
General Science
Physics
Ohm Law: V = ?
Correct Answer:
B. IR
EXPLANATION
V = I × R (Ohm Law).