IGCSE O Level Biology Practice Test 208

Effects of pH on enzymes Multiple Choice Questions (MCQ) PDF - 208

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Effects of pH on enzymes Questions and Answers PDF Download: Quiz 208

MCQ 1036: Nature of most intestinal enzymes is

A) acidic

B) alkaline

C) water based

D) mineral based

MCQ 1037: Bacteria capable to produce their own food are known as

A) saprophytes

B) parasites

C) autotrophs

D) penicillin

MCQ 1038: Neutral point like water (H₂O) has a pH of

A) 5

B) 6

C) 7

D) 10

MCQ 1039: Under natural conditions, the atmospheric carbon dioxide (CO₂) remains stable at

A) 0.0003

B) 0.0006

C) 0.0013

D) 0.0016

MCQ 1040: Intelligence of an animal can be judged through size of

A) brain

B) medulla oblongata

C) Cerebral hemisphere

D) cerebellum

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