Give Scientific Reason.Oxygen is Necessary for Complete Oxidation of Glucose. - Science and Technology 2

Short Note

Give scientific reason.

Oxygen is necessary for complete oxidation of glucose.



  1. Glucose can be used by two pathways i.e. aerobic and anaerobic respiration. 
  2. A molecule of glucose is completely oxidized in aerobic respiration (i.e. in the presence of oxygen) to form CO2, H2O, and energy (38 ATP), via. three steps namely glycolysis, Krebs cycle, and electron transfer chain.
  3. However, in anaerobic respiration (i.e. in absence of oxygen), glucose is incompletely oxidized via. glycolysis and fermentation, resulting in the formation of organic acids or alcohols and lesser amount of energy is obtained.

Hence, oxygen is necessary for the complete oxidation of glucose.

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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 2
Balbharati Science and Technology Part 2 10th Standard SSC Maharashtra State Board
Chapter 2 Life Processes in living organisms Part -1
Exercises | Q 4.1 | Page 21


Given below are the end products of different reactions involving glucose. Write the appropriate end product in front of the following:

(1) Anaerobic reaction =
(2) Reaction in human muscles =
(3) Aerobic respiration
(4) Reaction in plant cells =
(5) Reaction in liver =

 Why is diffusion insufficient to meet the oxygen requirementsof multi-cellular organisms like humans

What criteria do we use to decide whether something is alive?

 What processes would you consider essential for maintaining life?

Match the organisms given in column I with the processes given in column II:

  Column I   Column II
(i) Leech (a) Holozoic nutrition
(ii) Amoeba (b) Autotrophic nutrition
(iii) Mushroom (c) Parasitic nutrition
(iv) Green plant (d) Saprophytic nutrition

Match the terms in column I with those in column II :

  Column I   Column II
(i) Trypsin (a) Liver
(ii) Amylase (b) Gastric glands
(iii) Bile (c) Pancreas
(iv) Pepsin (d) Saliva


A person lives near a forest. Make a list of four items which he can get from the forest to meet his daily needs.



Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to?



Skin : Keratin : : Blood : ____________

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Grasshopper– Snake– Paddyfield– Eagle– Frog

Complete the following flowchart.

Fill in the blank and explain the statement.

Our muscle cells perform ______ type of respiration during exercise.

Write definition


Write the definition.


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Answer in detail.
Explain the glycolysis in detail.

Write the forms to which following food materials are converted after digestion.
2. Potato.
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4. Chapati

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How all the life processes contribute to the growth and development of the body?

Answer in detail.

Explain the Kreb's cycle with reaction.

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Find an odd one out.

Explain the Steps of Glycolysis.

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  1. Proteins
  2. Nitrates and Nitrites
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In each of the following situations what happens to the rate of photosynthesis?

  1. Cloudy days
  2. No rainfall in the area
  3. Good manuring in the area
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Balanced Diet

Explain the following concept in short:

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Give one example of each of the classifications of vitamins.


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