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.

Photosynthesis carried out by terrestrial plants is _________ of total photosynthesis?

A 1-2%

B 5%

C 10%

D 20%

Review Detailed Answer

Correct Answer: 10%

Which of the following statement about the head of a chlorophyll molecule is incorrect?

A It is a porphyrin ring or tetrapyrrole ring structure

B It is flat, square and light absorbing

C Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

D It is hydrophobic

Review Detailed Answer

Correct Answer: It is hydrophobic

Of the following, which one causes higher production of food in green plants?

A Blue

B Orange

C Red

D Violet

Review Detailed Answer

Correct Answer: Red

Chlorophyll is insoluble in_____________?

A Carbon tetrachloride

B Alcohol

C Organic solvents

D Water

Review Detailed Answer

Correct Answer: Water

First Actions spectrum was obtained by using__________?

A Algae

B Fungi

C Bacteria

D Spirogyra

Review Detailed Answer

Correct Answer: Spirogyra

Which of the light is mainly absorbed by the plants?

A Orange

B Red

C Green

D Both A and B

Review Detailed Answer

Correct Answer: Both A and B

The first action spectrum was obtained by___________?

A T.W.Englemam

B Malleus

C T.W.Inws

D W.Stapes

Review Detailed Answer

Correct Answer: T.W.Englemam

Which of the following light is least absorbed by the plants?

A Orange

B Red

C Blue

D Green

Review Detailed Answer

Correct Answer: Green

The percentage of light absorbed by the leaf is ___________?

A 20%

B 15%

C 10%

D 1%

Review Detailed Answer

Correct Answer: 1%

Visible light used in photosynthesis ranges from:__________?

A 300 – 700 nm in wavelength

B 350 – 750 nm in wavelength

C 380 – 750 nm in wavelength

D 390 – 790 nm in wavelength.

Review Detailed Answer

Correct Answer: 380 – 750 nm in wavelength

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Biology 1525 MCQs [All-Courses]

All Topics 1525

All Topics 1525

Photosynthesis carried out by terrestrial plants is _________ of total photosynthesis?

Which of the following statement about the head of a chlorophyll molecule is incorrect?

Of the following, which one causes higher production of food in green plants?

Chlorophyll is insoluble in_____________?

First Actions spectrum was obtained by using__________?

Which of the light is mainly absorbed by the plants?

The first action spectrum was obtained by___________?

Which of the following light is least absorbed by the plants?

The percentage of light absorbed by the leaf is ___________?

Visible light used in photosynthesis ranges from:__________?