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 not nocturnal?

A Bedbug

B Mosquito

C Butterfly

D Cockroach

Review Detailed Answer

Correct Answer: Butterfly

Golden brown colour of diatoms is due to presence of__________?

A Mycoxanthin, mucoxanthin and myxoxanthophylls

B Alpha and beta carotenes and myxoxanthin

C Fucoxanthin, diatoxanthin, diadinoxanthin

D None of the above

Review Detailed Answer

Correct Answer: Fucoxanthin, diatoxanthin, diadinoxanthin

Locomotion in diatoms is carried out with the help of__________?

A Valve

B Raphe

C Pseudopodium

D Cilia or flagella

Review Detailed Answer

Correct Answer: Raphe

Diatomaceous earth is used for making __________?

A Fertilizers

B Weedicides

C Insecticides

D Fire proof bricks

Review Detailed Answer

Correct Answer: Fire proof bricks

Diatoms stay afloat due to___________?

A Flagella

B Stored lpids

C Pseudopodia

D All of these

Review Detailed Answer

Correct Answer: Stored lpids

Oil body is found in the cells of___________?

A Diatoms

B Slime moulds

C Chlorophycean forms

D None of the these

Review Detailed Answer

Correct Answer: Diatoms

The chloroplasts of diatoms and chrysophycean algae do not possess____________?

A Chloryphyllpigments

B Enzymes for photolysis

C Defined grana and stroma

D Carotenes with chlorophylls

Review Detailed Answer

Correct Answer: Defined grana and stroma

Diatom frustule/ shell is made of_____________?

A Silica

B Calcium carbonate

C Manesium carbonate

D Both B. and C.

Review Detailed Answer

Correct Answer: Silica

Empty diatom cells are called___________?

A Raphe

B Valves

C Frustule

D Girdles

Review Detailed Answer

Correct Answer: Frustule

Cell wall is extremely well preserved in fossil specimens in__________?

A Diatoms

B Dinoflagellates

C Slime moulds

D None of these

Review Detailed Answer

Correct Answer: Diatoms

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Biology 1525 MCQs [All-Courses]

All Topics 1525

All Topics 1525

Which of the following is not nocturnal?

Golden brown colour of diatoms is due to presence of__________?

Locomotion in diatoms is carried out with the help of__________?

Diatomaceous earth is used for making __________?

Diatoms stay afloat due to___________?

Oil body is found in the cells of___________?

The chloroplasts of diatoms and chrysophycean algae do not possess____________?

Diatom frustule/ shell is made of_____________?

Empty diatom cells are called___________?

Cell wall is extremely well preserved in fossil specimens in__________?