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All Biology 11 papers

Class 11 · Past paper

Biology 11 past paper 2023

35 published questions in this index. The full practice view lets you work through them and track your own attempts.

12 MCQs23 written questionsPractise this paper

Question index

1
A person is given a vaccine for COVID. This is an example of:
MCQ1 marksannual
1
List any three organelles bounded by a single membrane and any three organelles bounded by double membrane.
Part B3 marksannual
1
What is plasma membrane? Explain in detail fluid mosaic model of plasma membrane.
Part C7 marksannual
2
State property of water that allows each of the following to take place. Briefly explain its importance: a. The cooling of skin during sweating b. The survival of fish in ice-cover…

This is a skimmable index, not a replacement for the study surface. Open the practice view to answer questions and use the linked study material.

Part B3 marksannual

2

How does the body give an inflammatory response when tissues are damaged?

Part C6 marksannual

3

Advantages to life on land for early amphibians included:

MCQ1 marksannual

3

The graph shows the effect of temperature on the rate of reaction of an enzyme. a. What is indicated by $X$? b. What is happening in region $A$? c. What is happening in region $B$?…

Part B3 marksannual

4

A group of ribosomes attached to mRNA is known as:

MCQ1 marksannual

4

Briefly explain what will happen if dead bodies are not decomposed by bacteria?

Part B3 marksannual

4

Photosynthesis and respiration are said to be complementary. How are these chemical reactions connected?

Part C3 marksannual

5

Which of the following pair is mismatched?

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5

What will happen if plants are exposed to green light? Explain briefly.

Part B3 marksannual

5

Describe uses of fungi in genetic engineering and antibiotic production.

Part C6 marksannual

6

What can be found in both **DNA** and messenger **RNA**?

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6

How penicillin affects bacterial cell? Describe briefly.

Part B3 marksannual

6

What does **ECG** stand for? Explain different phases with the help of a labelled diagram.

Part C7 marksannual

7

The compound that enters Kreb's cycle from glycolysis is:

MCQ1 marksannual

7

Compare the osmotic adjustments in different groups of plants in different environments.

Part C6 marksannual

8

Mesosomes are infoldings of the cell membrane and are involved in:

MCQ1 marksannual

8

List six features of bryophytes which made them to adapt on land.

Part B3 marksannual

9

Chitin is found in the cell wall of fungi, which is also found in the exoskeleton of:

MCQ1 marksannual

9

Why many insects are pests to humans when they are larvae but are beneficial when they are adults? Explain briefly.

Part B3 marksannual

11

In spermatophyte, seed is formed from:

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11

Differentiate between: a. Collenchyma and sclerenchyma b. Photoperiodism and Phototropism c. Apoplast pathway and symplast pathway.

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12

Which of the following pair of words are correctly matched?

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12

Many animals including humans eat seeds such as beans, peas, peanuts and almonds. Why are seeds a good food source?

Part B3 marksannual

13

Apical dominance is caused by:

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13

If stomach fails to produce $HCl$, how would this affect digestion? If left untreated, how could this affect the body as a whole?

Part B3 marksannual

14

Describe three functions of digestive system. Write down sequence of organs according to the order in which food passes through them.

Part B3 marksannual

15

Which of the following cells are destroyed in an **AIDS** infection?

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15

How would chronic diarrhoea affect homeostasis of the body?

Part B3 marksannual

16

What type of chemical reaction would be involved in the formation of glucose from starch or glycogen? Explain briefly.

Part B3 marksannual

18

A new mother had chicken pox as a child. Why does her newborn child not get the disease, even after being exposed to its virus?

Part B3 marksannual

19

How photosynthetic pigments are arranged in photosystem? Differentiate between the two types of photosystem.

Part B3 marksannual

20

Differentiate between viruses and viroids. Also give examples.

Part B3 marksannual

Biology 11 Past Paper 2023 | Notely