Free MCQs & Online Quiz Practice for Exams

Q: Plants are able to detect photoperiod changes by:

A) Alternation of the two forms of phytochrome

B) Settling of amyloplasts

C) Direction of the light source

D) Movement of potassium ions

Q: Which one of the following is true for annual ring?

A) It is composed of a ring of early wood and a ring of late wood

B) Its growth is co-related with the production of abscisic acid

C) It is produced from the axillary buds

D) It is produced as a result of primary growth

Q: Which of the following converts pepsinogen to the active form of pepsin in stomach?

A) Mucus

B) Gastrin

C) HCl

D) Chief cells

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

A) Liver

B) Kidneys

C) Stomach

D) Pancreas

Q: Which of the following is NOT a function of the liver?

A) Storing food

B) Manufacturing insulin

C) Producing digestive juices

D) Healing itself when it is damaged

Q: Which of the following is NOT part of the accessory organs in the digestive system?

A) Liver

B) Pancreas

C) Large intestines

D) Acini

Q: What is the function of the soft palate?

A) To keep opening to nasal cavity open at all times

B) To keep opening to nasal cavity open during swallowing

C) To keep opening to nasal cavity closed during swallowing

D) To keep opening to nasal cavity closed at all times

Q: An enzyme that acts only in an acidic medium is:

A) Pepsin

B) Trypsin

C) Pancreatic amylase

D) Lipase

Q: Absorption is maximum in the small intestine because of:

A) The presence of villi

B) Its thin walls

C) Its length

D) Its thick walls

Q: Appendix is a part of:

A) Ileum

B) Caecum

C) Duodenum

D) Colon

Q: Bile juice is:

A) Alkaline

B) Acidic

C) Semialkaline

D) Near acidic

Q: The digestive juice that is almost neutral is:

A) Gastric juice

B) Pancreatic juice

C) Bile juice

D) Saliva

Q: Which of the following is NOT a function of the small intestine?

A) Receives secretions from the pancreas and liver

B) Completes digestion of nutrients

C) Absorbs products of digestion

D) Transports the residue to the anal canal

Q: Which of the following statement is false regarding the function of the large intestines?

A) The only important secretion is mucous

B) Feces are formed and stored here

C) Main absorption is water and electrolytes

D) Digestive activity remain high in the large intestines

Q: What disorder is associated with self-imposed starvation and an obsession with thinness?

A) Obesity

B) Anorexia nervosa

C) Bulimia nervosa

D) Binge eating

Q: Which of the following is NOT a sign or symptom of anorexia nervosa?

A) Loss of menstrual cycles or periods

B) Low blood pressure

C) Increased sore throats and tooth decay

D) Increased dry, scaly, cold skin

Q: The foramen ovale in the fetal heart is located in the:

A) Right atrium

B) Left atrium

C) Interventricular septum

D) Interatrial septum

Q: Colouration of the skin of a baby turns bluish shortly after birth. The reason may be:

A) Increased level of anesthesia was administered to the mother

B) Baby has an unclosed foramen ovale

C) Some hormonal disturbance has caused discolouration

D) Blood capillaries in the liver are not working efficiently

Q: Lymph is poured back to the circulatory system in:

A) Pulmonary vein

B) Hepatic portal vein

C) Subclavian vein

D) Renal vein

Q: The interventricular septum and the intra-atrial septum separate the:

A) Chambers of the heart

B) Chambers of the lungs

C) Aorta and pulmonary artery

D) Bicuspid and tricuspid valves