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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

In which of the following component of the body, lactic acid fermentation takes place?

A Brain
B Heart
C Liver
D Muscles
Correct Answer: Muscles

The most important photosynthetic pigment is ___________?

A Chlorophyll a
B Chlorophyll b
C Xanthophyll
D Carotenes
Correct Answer: Chlorophyll a

The chlorophyll molecule is embedded in the core of thylakoid membrane which acts as___________?

A Hydrophilic
B Hydrophobic
C Both of these
D None of these
Correct Answer: Hydrophobic

In alcoholic fermentation Pyruvic acid is broken down into?

A Acetaldehyde
B Methyl alcohol
C Ethyl alcohol
D Lactic acid
Correct Answer: Ethyl alcohol

Deficiency of ___________ causes yellowing in plants?

A Magnesium
B Iron
C Chlorine
D Oxygen
Correct Answer: Magnesium

Chlorophylls mainly absorb _________ wavelengths?

A Orange – blue
B Violet – red
C Yellow – orange
D Orange – red.
Correct Answer: Orange – red.

Complete breakdown of glucose molecule takes place in which of the following?

A Alcoholic fermentation
B Lactic acid fermentation
C Aerobic respiration
D All of these
Correct Answer: Aerobic respiration

Xanthophylls are _________ pigments

A Yellow
B Red
C Orange
D Green
Correct Answer: Yellow

Chlorophylls are found embedded in the __________ membranes?

A Stroma
B Grana
C Thylakoid
D Intergrana
Correct Answer: Thylakoid

The dense fluid filled region in the chloroplast is____________?

A Grana
B Stroma
C Thylakoid
D None of these
Correct Answer: Stroma
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