IGCSE O Level Biology Practice Test 344

Circulatory system Multiple Choice Questions (MCQ) PDF - 344

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Circulatory system Questions and Answers PDF Download: Quiz 344

MCQ 1716: Presence of veins was demonstrated by

A) Jan-Baptista van Helmont

B) William Harvey

C) Robert Hooke

D) John Dalton

MCQ 1717: Essential glucose (C₆H₁₂O₆) and amino acids (R-CH(NH₂)-COOH) are reabsorbed through

A) osmosis

B) concentration gradient

C) active transport

D) blood pressure

MCQ 1718: In fungi, the starch (C₆H₁₀O₅)_n is converted to maltose (C₁₂H₂₂O₁₁) through

A) protease

B) deamination process

C) maltase

D) amylase

MCQ 1719: Examples of depressant drugs include

A) marijuana

B) cocaine

C) barbiturates

D) morphine

MCQ 1720: Use of fossil fuels causes

A) pollution

B) conservation of resources

C) global warming

D) infections

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