Answer: Option D. -> (d) A = Caecum, B = Vermiform appendix, C = Ascending colon, D = Transverse colon, E = Descending colon, F = Sigmoid.
:
D
First part of the large intestine is the Caecum, attached to which is the Appendix. This leads to the ascending colon, followed by the transverse colon an the descending colon. The last part of the large intestine is the sigmoid.

Answer: Option D. -> All of the above
:
D
The functions of the digestive system are to ingest food, to digest food to small nutrients molecules that can pass through membranes, to absorb nutrient molecules, and to eliminate indigestible remains.

Answer: Option C. -> If (A) is true, but (R) is false
:
C
Bile has no enzymes but bile has bile salts that help in digestion by emulsification of fats.

Answer: Option C. -> Crypts of Leiberkuhn
:
C
These enzymes include peptidase, sucrase, maltase, lactase and intestinal lipase.

Answer: Option C. -> Vitamin C
:
C
Vitamin C is a water soluble vitamin needed to be taken into the body in small amounts. Vitamin C is therefore categorised as a micronutrient. All the others mentioned here, i.e., proteins, lipids and monosaccharides are macronutrients. They are required by the body in large quantities for supply of energy and as building blocks in the body. Monosaccharides like glucose molecules are the primary source for energy in the body.

Answer: Option C. -> Active transport
:
C
Active transport occurs against the concentration gradient and hence requires energy. Various nutrients like amino acids, monosacharides like glucose,electrolytes like Na+ are absorbed into the blood by this mechanism.

Answer: Option D. -> glucose +galactose
:
D
Lactose is hydrolysed to glucose and galactose ,in presence of lactase enzyme.

Answer: Option D. -> Smooth movement of food downwards the intestine
:
D
Goblet cells are present in the columnar epithelium of the mammalian intestine and secrete mucin, a mucoprotein that forms mucus when in solution. If Goblet cells become non functional, this will adversely affect smooth movement of food downwards the intestine due to absence of mucin.

Answer: Option B. -> i). ⇒ d., ii). ⇒ a., iii). ⇒ b., iv). ⇒ c
:
B
The correct matching pairs are :
Intracellular digestion takes place in amoeba. Amoeba is an unicellular organism and it ingests food through phagocytosis, and stores it inside the body in a vacuole. The digestion takes place inside the vacuole, within the body of the organism and therefore it showsintracellular digestion.
Digestion in humans occur inside the alimentary canal that is a hollow digestive tract that enables ingestion, digestion and absorption of food. It does not occur inside cells and therefore is extracellular digestion.
Breaking fooddown into smaller particles, such that you increase the surface area of the food materials occurs in the oral cavity of many animals through a process called mastication or chewing.
Biochemical disgestion is the breakdown of small food particles with the help of enzymes, therefore it is also called enzymatic digestion.

Answer: Option B. -> Three types of digestive enzymes and two important gluose related hormones
:
B
Pancreas secretes three types of digestive enzymes trypsinogen, chymotrypsinogen and procarboxypeptidase. These enzymes digest proteins. The two hormones secreted are insulin and glucagon that maintain glucose level in the blood.