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 statement about Homeostasis is incorrect?

A There is a definite control system that regulates the homeostatic activities

B Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment

C Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment

D All are correct

Review Detailed Answer

Correct Answer: Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment

Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane?

A Change in membrane protein composition.

B Change in the solute composition of the cell membrane which prevents crystallization.

C Increase in proportion of unsaturated fatty acids.

D Development of heat shock proteins.

Review Detailed Answer

Correct Answer: Increase in proportion of unsaturated fatty acids.

Which of the following mechanism explains development of anemia in Renal failure?

A Failure of bone marrow is accompanied with renal failure.

B Destruction of RBC results from accumulated urea in the blood.

C Chronicity of the disease is respobsible for anemia

D Failure of proper RBC synthesis, due to lack of chemical stimulation.

Review Detailed Answer

Correct Answer: Failure of proper RBC synthesis, due to lack of chemical stimulation.

Which of the following constituent is/are maximum in the filtrate that leaves proximal convoluted tubules?

A Glucose

B Amino acids

C Nitrogenous waste

D All of these

Review Detailed Answer

Correct Answer: Nitrogenous waste

Protonephridia are present in____________?

A Round worms

B Flateworm

C Tape worms

D Segmented worms

Review Detailed Answer

Correct Answer: Flateworm

Aquatic animals excrete nitrogenous waste commonly in the form of_____________?

A Ammonia

B Urea

C Uric acid

D Trimethylamine oxide

Review Detailed Answer

Correct Answer: Ammonia

Terrestrial animals like kangaroo rat survive even without drinking water since__________?

A They don’t require water for their metabolic process

B They can retain excessive water in their body during raining season.

C They feed on carbohydrate rich seeds which can provide them with metabolic water

D They are anhydrobiotic organisms

Review Detailed Answer

Correct Answer: They are anhydrobiotic organisms

Which among the following is an Autotroph _________ ?

A Butterfly

B Mushroom

C Fish

D Algae

Review Detailed Answer

Correct Answer: Algae

The biggest group of invertebrates is_________?

A Worms

B Insects

C Jelly fish

D None of these

Review Detailed Answer

Correct Answer: Insects

The body of ________ is not made of cell.

A Bacteria

B Fungi

C Viruses

D Algae

Review Detailed Answer

Correct Answer: Bacteria

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Biology 1525 MCQs [All-Courses]

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All Topics 1525

Which of the following statement about Homeostasis is incorrect?

Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane?

Which of the following mechanism explains development of anemia in Renal failure?

Which of the following constituent is/are maximum in the filtrate that leaves proximal convoluted tubules?

Protonephridia are present in____________?

Aquatic animals excrete nitrogenous waste commonly in the form of_____________?

Terrestrial animals like kangaroo rat survive even without drinking water since__________?

Which among the following is an Autotroph _________ ?

The biggest group of invertebrates is_________?

The body of ________ is not made of cell.