All Free Biology MCQs with Answers

• A. Lipase
• B. Trypsin
• C. Pepsin
• D. Amylase

Explanation: Pancreatic juice contains Lipase, Trypsin, and Amylase. Thus it does not contain Pepsin and Option C is the correct answer.

• A. Protein digestion
• B. HCl secretion
• C. Protein absorption
• D. HCl inhibition

Explanation: Parietal cells are responsible for HCl secretion, which aids in the digestion of food, absorption of minerals, and control of harmful…

• A. Absorption of electrolytes.
• B. Absorption of water
• C. Production of vitamins
• D. Absorption of amino acids

Explanation: Absorption of nutrients occurs in the small intestine. The nutrients are absorbed through the villi of the small intestine.

• A. Trachea
• B. Pharynx
• C. Larynx
• D. Oesophagus

Explanation: The pharynx is part of two body systems (the respiratory system and the digestive system) because it carries both air and food.

• A. Pepsin
• B. Sucrose
• C. Enterokinase
• D. Pancreatic lipase

Explanation: The function of the pancreatic juice is to digest and break down large sugars, fats, and starches into smaller assimilable molecules.

• A. Amylase
• B. Erypsin
• C. Lactase
• D. Carboxypeptidase

Explanation: Amylase is produced mostly in the pancreas, but also in the salivary glands and small intestine.

• A. Oxyntic cells
• B. Chief cells
• C. Mucus cells
• D. Endocrine cells

Explanation: Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen.

• A. Proteolytic enzyme action
• B. Dissolving in mucus
• C. Hormonal action
• D. Hydrochloric acid

Explanation: Pepsinogen is converted into pepsin by hydrochloric acid.

• A. Proteins
• B. Fats
• C. Carbohydrates
• D. Vitamins

Explanation: Digestion of carbohydrates begins in the oral cavity with the action of salivary amylase.

• A. Trypsin
• B. Pepsin
• C. Protease
• D. All of these

Explanation: The enzymes mentioned above, are the enzymes that break down protein into simpler forms.

• A. Oxygenated
• B. Deoxygenated
• C. Oxygenated and Deoxygenated
• D. None

Explanation: The left side pumps oxygenated blood (high in oxygen and low in carbon dioxide) to the organs of the body.

• A. Aorta
• B. Pulmonary veins
• C. Pulmonary artery
• D. Dorsal aorta

Explanation: The pulmonary artery leaves the right ventricle and takes blood to the lungs.

• A. Left ventricle
• B. Right ventricle
• C. Left atrium
• D. Right atrium

Explanation: The aorta is the largest vessel within the human body. It originates from the left ventricle of the heart anterior to the pulmonary artery…

• A. Left atrium
• B. Left ventricle
• C. Right ventricle
• D. Right atrium

Explanation: The left ventricle is the heart chamber that pumps oxygenated blood into the aorta, which then carries it to the rest of the body.

• A. Reticulocytes
• B. Erythrocyte
• C. Basiophilic erythroblasts
• D. None of these

Explanation: Option A: Reticulocytes are immature red blood cells that still contain remnants of ribosomes and RNA.

• A. 1
• B. 2
• C. 3
• D. 4
• E. They are not produced in complete process of oogenesis

Explanation: Explanation for this question will be added soon.

• A. Fundus of uterus
• B. Oviduct
• C. Body of uterus
• D. Cervix
• E. Ovary

Explanation: Explanation for this question will be added soon.

• A. Oxytocin
• B. FSH
• C. Estrogen
• D. Progesterone

Explanation: Option A: Oxytocin is a hormone that is released during childbirth and breastfeeding.

• A. Epimetrium
• B. Perimetrium
• C. Myometrium
• D. Endometrium

Explanation: The endometrium is the inner layer that lines the uterus. It is made up of glandular cells that make secretions and the place where young…

• A. 300-320
• B. 322-350
• C. 270-280
• D. 240-250

Explanation: The average length of human gestation is 280 days, or 40 weeks, from the first day of the woman's last menstrual period.