Science (English Medium) कक्षा ११ - CBSE Question Bank Solutions for Biology

Trypsinogen is an inactive enzyme of pancreatic juice. An enzyme, enterokinase, activates it. Which tissue/ cells secrete this enzyme?/ How is it activated?

Name the enzymes involved in the breakdown of nucleotides into sugars and bases?

Define digestion in one sentence.

Correct the following statement by deleting one of entries (given in bold).

Goblet cells are located in the intestinal mucosal epithelium and secrete chymotrypsin/mucus.

Correct the following statement by deleting one of entries (given in bold).

Fats are broken down into di- and monoglycerides with the help of amylase/ lipases.

Correct the following statement by deleting one of entries (given in bold).

Saliva contains enzymes that digest starch/protein.

Name the part of the alimentary canal where major absorption of digested food takes place. What are the absorbed forms of different kinds of food materials?

Correct the statement given below by the right option shown in the bracket against them.

Rennin is a proteolytic enzyme found in gastric juice in (infants/adults).

Correct the statement given below by the right option shown in the bracket against them.

Pancreatic juice and bile are released through. (intestine- pancreatic/hepato-pancreatic duct)

Correct the statement given below by the right option shown in the bracket against them.

Dipeptides, disaccharides and glycerides are broken down into simple substances in region of small intestine. (jejunum/duodenum)

How is the intestinal mucosa protected from the acidic food entering from stomach?

How are the activities of gastro-intestinal tract regulated?

Describe the enzymatic action on fats in the duodenum.

A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal.

A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is ______.

From the following relationships between respiratory volume and capacities and mark the correct answer.

1. Inspiratory capacity (IC) = Tidal Volume + Residual Volume
2. Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV).
3. Residual Volume (RV) = Vital Capacity (VC) – Inspiratory Reserve Volume (IRV)
4. Tidal Volume (TV) = Inspiratory Capacity (IC) – Inspiratory Reserve Volume (IRV)

Define the following terms?

Tidal volume

Define the following terms?

Residual volume

Arrange the following terms based on their volumes in an ascending order.

1. Tidal Volume (TV)
2. Residual Volume (RV)
3. Inspiratory Reserve Volume (IRV)
4. Expiratory Capacity (EC)

Complete the missing terms

Inspiratory Capacity (IC) = ______ + IRV