CIE Biology Paper-4: Specimen Questions 77 - 80 of 120

Question number: 77

Essay Question▾

Describe in Detail

If, a person is suffering from DNA deficiency. How will he be cured?

Explanation

Person can be cured by the help of gene therapy. In such therapy, ADA gene has taken from the leucocytes of a healthy person and inserted it into a retrovirus than it is injected to the lymphocyte stem cells of patient along with helper virus. Lymphocytes generated by these stem cells had normal ADA gene. Permanent cure can be done when functional ADA gene is introduced in cell of early embryo.

Passage

The figure shows the exchange of two gases between plant and animal.

Find the values in 2 empty boxes

Find the values in 2 empty boxes

Which gases must come in this diagram

Question number: 78 (1 of 2 Based on Passage) Show Passage

Short Answer Question▾

Write in Short

Which processes are done in given figure. Explain them?

Explanation

Photosynthesis process and respiration occur.

Photosynthesis-It is a process, which is used by plants and other organisms to convert light energy into chemical energy.

Respiration- Respiration is a process, which occur inside the living cells of every type of organism. It is the sum total of the physical and chemical processes in an organism by which oxygen is transfer to tissues and cells, and the oxidation products, carbon dioxide and water, are given off.

Question number: 79 (2 of 2 Based on Passage) Show Passage

Short Answer Question▾

Write in Short

Identify the values in 2 boxes

Explanation

Oxygen and carbon dioxide are part of these boxes

Oxygen and carbon dioxide are part of these boxes

Which gases must come in this diagram

Question number: 80

Essay Question▾

Describe in Detail

How aerobic respiration is different from anaerobic respiration

Explanation

In the process of aerobic respiration oxygen is needed and in anaerobic respiration does not use oxygen.

Table shows difference between aerobic and anaerobic respiration

Table shows comparison of aerobic and anaerobic respiration

Aerobic Respiration

Anaerobic Respiration

Aerobic respiration occurs in most cells

It occurs mainly in prokaryotes

The amount of energy release is high about 36 - 38 ATP molecules

The amount of energy releases is low about 2 ATP molecules

Products are Carbon dioxide, water, ATP

Carbon dioxide, reduced species, ATP

It does not produce ethanol or lactic acid

It produce ethanol or lactic acid

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