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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

Which statement about enzyme is incorrect_________________?
A Some of them consist solely of protein with no non protein part.
B They catalyze a chemical reaction without being utilized.
C All enzymes are fibrous Proteins.
D They without their cofactor are called apoenzyme.
Correct Answer: All enzymes are fibrous Proteins.
Centrioles are composed of ________ triplets of microtubules.
A 3
B 9
C 10
D 15
Correct Answer: 9
An activated enzyme consisting of polypeptide chain and a cofactor is called_______________?
A Apoenzyme
B Holoenzyme
C Activated enzyme
D Both b and c
Correct Answer: Both b and c
A cofactor made of inorganic ion which is detachable is called__________________?
A Prosthetic group
B Coenzyme
C Activator
D Cofactor
Correct Answer: Activator
In golgi apparatus the maturing face is____________?
A Biconcave
B Convex
C Spherical
D Concave
Correct Answer: Concave
In which of the following location enzymes controlling cellular respiration are present____________?
A Nucleus
B Chlorophast
C Milochondria
D Ribosome
Correct Answer: Milochondria
Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called_____________________?
A Cofactor
B Coenzymes
C Activator
D Enzymes
Correct Answer: Enzymes
Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by___________?
A Ribosomes
B Cytoplasm
C Golgi apparatus
D Endoplasmic reticulum
Correct Answer: Golgi apparatus
Which one forms the raw material for coenzymes_______________________?
A Vitamins
B Carbohydrates
C Proteins
D Metals
Correct Answer: Vitamins
Enzymes __________________ the activation energy of a chemical reaction?
A Increases
B Decreases
C Does not effect
D Increases or decreases depending upon individual enzyme
Correct Answer: Decreases
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