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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

Total number of amino acids discovered so far in cells and tissues are______________?
A 20
B 25
C 150
D 170
Correct Answer: 170
Hunger pangs usually begin ______ after the previous meal.
A 2-4 hours
B 6-8 hours
C 10-12 hours
D 12-24 hours
Correct Answer: 12-24 hours
The element in basic structure of proteins which differentiate them from carbohydrates________?
A C
B S
C H
D N
Correct Answer: S
How many moles of carbon dioxide are produced by complete oxidation of one mole of puruvic acid?
A 1
B 2
C 3
D 6
Correct Answer: 3
In Glycin an amino acid R group is replaced by____________?
A H
B CH3
C COOH
D C = O
Correct Answer: H
Which of the following is the empirical formula of chlorophyll b?
A C55H70O5N4Mg
B C55H72O6N4Mg
C C55H70O6N4Mg
D C55H72O5N4Mg
Correct Answer: C55H70O6N4Mg
Proteins are polymers of___________?
A Fatty acids
B Isoprenoid units
C Amino acids
D Nucleotides
Correct Answer: Amino acids
Following possess bilateral symmetry as larva and radial symmetry as adult:
A Chordata
B Hydra
C Echinodermata
D Hemichordata
Correct Answer: Echinodermata
Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA_________________?
A i & ii
B iii & iv
C i ii iii & iv
D iv only
Correct Answer: iv only
Which one of the following syndrome is the result of meiotic non dysjunction?
A Klinefelters syndrome
B Turners syndrome
C Downs syndrome
D All of these
Correct Answer: All of these
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