Science (English Medium) Class 11 - CBSE Question Bank Solutions for Biology

A process is occurring throughout the day, in ‘X’ organism. Cells are participating in this process. During this process ATP, CO₂ and water are evolved. It is not a light dependent process.

1. Name the process.
2. Is it a catabolic or an anabolic process?
3. What could be the raw material of this process?

Fill in the places with appropriate word/words.

A phase of growth which is maximum and fastest is ______.

A primary root grows from 5 cm to 19 cm in a week. Calculate the growth rate and relative growth rate over the period.

In the figure of Sigmoid growth curve given below, label segments 1, 2 and 3.

Growth is one of the characteristic of all living organisms? Do unicellular organisms also grow? If so, what are the parameters?

Fill in the blanks:

Maximum growth is observed in ______ phase.

Mark the right statement among the following

The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then?

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?