Biology Question

## 1.

Which of the following is the correct sequence in human alimentary canal?

A. Mouth Stomach Oesophagus Small intestine Large intestine

B. Mouth Oesophagus Stomach Small intestine Large intestine

C. Mouth Small intestine Stomach Large intestine

D. Mouth Oesophagus Large intestine Small intestine

**Answer:** B

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## 2.

The enzyme present in saliva is:

A. Pepsin

B. Trypsin

C. Amylase

D. Lipase

**Answer:** C

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## 3.

Where does complete digestion of carbohydrates, proteins, and fats occur?

A. Mouth

B. Stomach

C. Small intestine

D. Large intestine

**Answer:** C

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## 4.

The functional unit of kidney is:

A. Neuron

B. Nephron

C. Alveoli

D. Villi

**Answer:** B

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## 5.

Oxygen is transported in human blood by:

A. Plasma

B. Platelets

C. Haemoglobin

D. WBCs

**Answer:** C

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## 6.

Which blood vessel carries oxygenated blood from lungs to heart?

A. Pulmonary artery

B. Vena cava

C. Aorta

D. Pulmonary vein

**Answer:** D

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## 7.

The process of breakdown of glucose in the absence of oxygen is called:

A. Aerobic respiration

B. Photosynthesis

C. Anaerobic respiration

D. Transpiration

**Answer:** C

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## 8.

During photosynthesis, plants take in:

A. Oxygen and water

B. Carbon dioxide and water

C. Nitrogen and oxygen

D. Hydrogen and oxygen

**Answer:** B

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## 9.

Opening and closing of stomata depend on:

A. Root pressure

B. Chlorophyll

C. Guard cells

D. Xylem vessels

**Answer:** C

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## 10.

Which part of the heart receives oxygenated blood from lungs?

A. Right atrium

B. Right ventricle

C. Left atrium

D. Left ventricle

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