The pigment responsible for the orange color in carrots is: MCQ with Answer and Explanation

The pigment responsible for the orange color in carrots is:
A. Chlorophyll
B. Beta-carotene
C. Xanthophyll
D. Lycopene
Answer: Option B
Solution (By JKSSB Mock Tests)
Beta-carotene is a precursor of vitamin A (provitamin A) and imparts an orange color to carrots, pumpkins, and sweet potatoes. Lycopene gives red color to tomatoes, chlorophyll is green, xanthophyll is yellow. Beta-carotene is an antioxidant and is important for vision and immune function.

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Practice More Biology Questions

Question #1
The green pigment that traps light energy in plants is located in the:
A. Thylakoid membranes of chloroplasts
B. Cytoplasm
C. Nucleus
D. Cell wall

Correct Answer: Option A


Explanation:
Chlorophyll, the primary photosynthetic pigment, is embedded in the thylakoid membranes within chloroplasts. These membranes contain photosystems I and II, where light-dependent reactions occur. The stroma of the chloroplast houses the Calvin cycle enzymes. Chlorophyll absorbs mainly blue and red light, reflecting green, giving leaves their color.

This question belongs to: Science Biology
Question #2
The technique used to study the internal structures of cells using electron beams is:
A. Electron microscopy
B. Chromatography
C. Spectrophotometry
D. Light microscopy

Correct Answer: Option A


Explanation:
Electron microscopes use beams of electrons to achieve much higher resolution than light microscopes, enabling visualization of organelles and macromolecular complexes. Types include TEM (internal) and SEM (surface). Light microscopes use visible light, spectrophotometry measures absorbance, chromatography separates.

This question belongs to: Science Biology
Question #3
The scientist who discovered the structure of chlorophyll was:
A. Hans Fischer
B. Robert Woodward
C. Melvin Calvin
D. Richard Willstätter

Correct Answer: Option A


Explanation:
Hans Fischer determined the structure of chlorophyll in the 1930s and synthesized hemin. Willstätter studied its composition, Calvin elucidated the carbon fixation pathway, Woodward synthesized chlorophyll.

This question belongs to: Science Biology