Question

3 examples of biological processes which involve the expenditure of energy from atp

Answer 1

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ATP is required for various biological processes in animals including; Active Transport, Secretion, Endocytosis, Synthesis and Replication of DNA and Movement

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Answer 2

Three examples of biological processes which involves the expenditure of energy are give below:

Answer:

1. Active transport of substances

• In the active transport of substances such as glucose, ions, amino acids there occurs expenditure of ATP.

• In active transport, expenditure of ATP occurs because in this transport the substances are transported from low concentration region to higher concentration.

• Therefore, the substances moves against the concentration gradient direction and hence requires energy in the form of ATP.

2. Glycolysis

• Glycolysis can be defined as the process in which there occurs break down of glucose into two pyruvate molecules, NADH, ATP and H2O

• In this process, two ATP molecules are used up or utilized. The first ATP is used up when there occurs formation of glucose-6-phosphate from glucose.

• The second ATP is used up in the step when fructose-1,6-bisphosphate is formed from fructose-6-phosphate.

3. Muscle contraction

• During muscle contraction, ATP is used. Even in the relaxation of muscles, ATP is utilised.

• For example: during contraction, formation of cross bridge between myosin and actin filament is formed by hydrolysis of ATP.

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