Free MCQs & Online Quiz Practice for Exams

Q: When you suck a cold drink using a drinking straw, it resembles with

A) Diffusion

B) Flow of material in xylem

C) Flow of material in phloem

D) Root pressure

Q: The cells which form platelets are

A) Erythrocytes

B) Leucocytes

C) Bone marrow cells

D) All of these

Q: A person is transfused with a donor's blood group 'O'. His blood group may be

A) A

B) B

C) AB

D) All of these

Q: Which of the following chambers has the thickest walls in the human heart?

A) Right atrium

B) Left atrium

C) Left ventricle

D) Right ventricle

Q: The exchange of materials between the blood and tissues occurs in

A) Arteries

B) Veins

C) Capillaries

D) Arteries and veins

Q: All veins carry deoxygenated blood except the one vein called

A) Vena cava

B) Hepatic portal

C) Pulmonary

D) Renal

Q: Valves to prevent the backflow of blood are found in

A) Arteries

B) Veins

C) Capillaries

D) Arteries and capillaries

Q: Which cells of blood are responsible for clotting?

A) Platelets

B) Erythrocytes

C) Neutrophils

D) Basophils

Q: The deficiency of which macronutrient causes chlorosis in plants

A) Carbon

B) Oxygen

C) Nitrogen

D) Calcium

Q: All of the following are elements that plants need in very small amounts (micronutrients) except

A) Hydrogen

B) Iron

C) Chlorine

D) None of these

Q: Which substance is used by plants to make proteins?

A) Carbon dioxide

B) Oxygen

C) Nitrates

D) None of these

Q: What happens when food reaches the stomach?

A) No digestion occurs in the stomach

B) The food moves quickly into the small intestine

C) Juices mix with the food and stomach muscles squeeze it

D) The food is completely digested and absorbed into the circulatory system

Q: Which of the following does not manufacture digestive juices?

A) Oesophagus

B) Stomach

C) Pancreas

D) Intestine

Q: What is absorbed from the material when it is in the large intestine?

A) Water

B) Vitamins

C) Salts

D) All of these

Q: Which of the following is not a function of salivary glands?

A) Start digestion of proteins

B) Helps in lubrication

C) Secrete saliva

D) Makes taste possible

Q: The cardiac sphincter serves as a valve between

A) Stomach and duodenum

B) Esophagus and stomach

C) Duodenum and ileum

D) Jejunum and caecum

Q: The function of the liver is to

A) Metabolize carbohydrates, lipids and proteins

B) Break mature red blood cells

C) Detoxify the chemicals

D) All of the above

Q: The digestive enzyme pepsin secreted by gastric glands begins the digestion of

A) Carbohydrates

B) Proteins

C) Fats

D) Vitamins

Q: Which character of viruses makes their resemblance with living organisms?

A) They can be crystallized

B) They cannot live outside host body

C) They contain DNA or RNA

D) All of the above

Q: Euglena belongs to the kingdom Protistae:

A) It is unicellular

B) It is Eukaryotic

C) Having both plant and animal like characters

D) It lives in water