Give scientific reasons. We feel exhausted after exercising. - Science and Technology 2

Short Note

Give scientific reason.

We feel exhausted after exercising.

Give scientific reason.

We feel tired after exercise.



  1. While exercising the muscle cells perform anaerobic respiration.
  2. During anaerobic respiration in muscle cells, lactic acid accumulates in the body.
  3. Lactic acid accumulation is a result of the process of fermentation during which glucose is broken down by anaerobic respiration, forming organic acids.
  4. Also, the production of ATP is comparatively less during anaerobic respiration.
    Hence, we feel exhausted after exercising.
Concept: Formation of ATP
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2019-2020 (March) Set 1


Fill in the blank and explain the statement

After complete oxidation of a glucose molecules, ---- --- --- number of ATP molecules are formed.

Distinguish between

Aerobic and anaerobic respiration.

Give scientific reason.

Cell division is one of the very important properties of cells and living organisms.

Write the correct option from the given multiple options.
We get from carbohydrates.

Choose the correct option.

Which step of Kreb's cycle operates substrate-level phosphorylation?

Fill in the blank with a suitable word.

In the prokaryotes ______ molecules of ATP are formed per molecule of glucose oxidised.

Fill in the blank with a suitable word.

F1- F0 particles participate in the synthesis of _______.

Fill in the blank with a suitable word.

During glycolysis ______ molecules of NADH+H+ are formed.

Answer the following question.

When and where does anaerobic respiration occur in man and yeast?

Answer the following question.

Why is less energy produced during anaerobic respiration than in aerobic respiration?

Answer the following question.

Which compound is the terminal electron acceptor in aerobic respiration?

Answer the following question.

Where is the respiration electron transport system located in a cell?

Answer the following question.

Write explanatory notes on Electron transport chain.

We get __________ energy from lipids.

Give scientific reason.

We feel tired after exercising.

Give scientific reason.

Some higher plants, animals and aerobic microorganisms also sometimes perform anaerobic respiration.

What is cellular respiration?

State two methods of cellular respiration.

Which molecules are formed during the glycolysis process?

Which molecules are formed after whole oxidation of Acetyl co-enzyme A?

Explain the use of fatty acids.

What are vitamins?

State six types of vitamins.

What are the main steps of anaerobic respiration?

Why is water an essential nutrient?

Identify the CORRECT way/s of Phosphorylation.

Read the following statements and select the CORRECT option.

Statement I: In oxidative phosphorylation ATP is synthesized by using the energy released during the oxidation of substrates like NADH+ H+ and FADH2.

Statement II: Substrate-level phosphorylation is a direct phosphorylation of ADP by transfer of a phosphate group from any suitable substrate.

Substrate level phosphorylation takes place in ______.

Identify the cell organelle that is responsible for extracting energy from carbohydrates to form ATP.

Which of the following is TRUE with respect to ATP?

In glycolysis,____________ ATP molecules are formed directly.

Complete the following analogy and select the correct option.

Respiration: Catabolic process:: ______ : Anabolic process

In the mitochondrion, energy is stored in the form of ____________.

The main purpose of respiration is to convert ______

The common immediate source of energy in cellular activity is ______.

Give three uses of fatty acids.


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