Give scientific reason. We feel tired after exercising. - Science and Technology 2

Short Note

Give scientific reason.

We feel tired after exercising.



  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.
    Therefore, we feel tired after exercising.
Concept: Formation of ATP
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Chapter 2: Life Processes in Living Organisms Part - 1 - Give scientific reasons


SCERT Maharashtra Question Bank 10th Standard SSC Science and Technology 2 Maharashtra State Board
Chapter 2 Life Processes in Living Organisms Part - 1
Give scientific reasons | Q 1


Fill in the blank and explain the statement

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

Write definition.

Cellular respiration

Distinguish between

Aerobic and anaerobic respiration.

Answer the following questions.

a) Why some living organisms have to perform anaerobic respiration?
b) Give examples of such living organisms.
c) What are the two steps of anaerobic respiration?

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.

Protein located in bones is ___________.

Which of the following vitamins is necessary for the synthesis of NADH2?

What is cellular respiration?

Which molecules are formed during the glycolysis process?

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

Which amino acids are obtained after digestion of proteins?

Explain the use of fatty acids.

What are vitamins?

What are the main steps of anaerobic respiration?

Write the importance of fibers in our diet.

During which of the following steps of glycolytic pathway ATP is directly formed?

  1. 3 - phospboglyceric acid to 2 phosphoglycerate
  2. Phosphoenolpyruvate to pyruvic acid
  3. 1, 3 - bisphosphoglyceric acid to 3 phosphoglycerate
  4. Fructose 1, 6 - bisphospbate to glyceraldehyde - 3 - phosphate

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.

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.

Where does the oxidative phosphorylation occur?

The main purpose of respiration is to convert ______

What is fatty acid?

Which of the following statement is incorrect about ATP?

Which one is amino acid?

Give three uses of fatty acids.


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