Showing 51–60 of 74 questions
Q.51
Easy
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.52
Easy
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.53
Easy
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.54
Easy
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.55
Easy
Human Body
Largest gland in human body?
Correct Answer:
C. Liver
Explanation:
Liver is largest gland.
Q.56
Easy
Human Body
Human body has how many bones?
Correct Answer:
B. 206
Explanation:
Adult body has 206 bones.
Q.57
Easy
Physics
Sound cannot travel through?
Correct Answer:
C. Vacuum
Explanation:
Sound needs medium, not vacuum.
Q.58
Easy
Biology
Powerhouse of cell?
Correct Answer:
C. Mitochondria
Explanation:
Mitochondria produces ATP.
Q.60
Easy
Environment
Gas causing global warming?
Correct Answer:
C. Carbon Dioxide
Explanation:
CO₂ is main greenhouse gas.