Biology 1525 MCQs [All-Courses]

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.

Which of the following is a compensation point:

A Leaves respire and utilize O2 and release CO2.

B Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.

C Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.

D Rate of respiration becomes more than rate of photosynthesis.

Review Detailed Answer

Correct Answer: Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.

Molecular formula of chlorophyll b is_____________?

A C55 H10 O4 N6 Mg

B C55 H70 O6 N5 Mg

C C55 H71 O6 N4 Mg

D C55 H70 O6 N4 Mg

Review Detailed Answer

Correct Answer: C55 H70 O6 N5 Mg

At which times there is no net gaseous exchange between leaves and the atmosphere.

A Day time.

B Night time.

C Dawn & Dusk.

D Mid night.

Review Detailed Answer

Correct Answer: Dawn & Dusk.

Bacteriochlorophylls does not include________________?

A Chlorophyll e

B Chlorophyll d

C Chlorophyll a

D Chlorophyll c

Review Detailed Answer

Correct Answer: Chlorophyll a

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:____________?

A Photosynthesis

B Aerobic respiration

C Anaerobic respiration

D Respiration

Review Detailed Answer

Correct Answer: Aerobic respiration

Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy.

A Organic

B Energy rich

C Energy poor

D Reduced

Review Detailed Answer

Correct Answer: Energy poor

Which of the following is a chemical link between catabolism and anabolism?

A AMP

B ADP

C ATP

D All of these

Review Detailed Answer

Correct Answer: ATP

Which of the following feature is not related to neuron?

A Conduction

B Regeneration

C Reflex

D Movement

Review Detailed Answer

Correct Answer: Regeneration

Receptors for hearing come under heading of___________?

A Chemical

B Mechanical

C Photo

D Nociceptors

Review Detailed Answer

Correct Answer: Mechanical

Value of resting membrane potential is_____________?

A 0.03 V

B 0.05 V

C 0.07 V

D 0.09V

Review Detailed Answer

Correct Answer: 0.07 V

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Biology 1525 MCQs [All-Courses]

All Topics 1525

All Topics 1525

Which of the following is a compensation point:

Molecular formula of chlorophyll b is_____________?

At which times there is no net gaseous exchange between leaves and the atmosphere.

Bacteriochlorophylls does not include________________?

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:____________?

Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy.

Which of the following is a chemical link between catabolism and anabolism?

Which of the following feature is not related to neuron?

Receptors for hearing come under heading of___________?

Value of resting membrane potential is_____________?