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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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