Home/General-Knowledge/Biology

Biology MCQs

1146 questionsGeneral-KnowledgePage 127 of 128

Practice free Biology multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1146 questions — no login required.

Question 1135easy

In N₂ - fixation process, nitrite is converted to nitrate by

⚑ Report ✎ Feedback

Question 1136easy

The plasma of the blood contains which among the following constituents?
I. Proteins
II. Salts
III. Hormones

⚑ Report ✎ Feedback

Question 1137easy

Precentage of CO₂ found in exhaled air is

⚑ Report ✎ Feedback

Question 1138medium

Consider the following plant
1. Guava
2. Mint
3. Sweet potato
The roots of which of these plants bear adventitious buds that developed into new individuals under favourable conditions.

⚑ Report ✎ Feedback

Question 1139medium

Some species of which of the below kinds of organisms are employed as biopesticides?
1. Bacteria
2. Fungi
3. Flowering plants

⚑ Report ✎ Feedback

Question 1140easy

Complete oxidation of sucrose in presence of oxygen into CO₂, water and energy is called

⚑ Report ✎ Feedback

Question 1141medium

Most fish do not sink in water because of the presence of:
I. swim bladder
II. air bladder
III. air sacs
IV. air in spongy bones