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प्रश्न
Write the definition.
Proteins
उत्तर
Proteins: Large molecules composed of one or more chains of amino acids in a specific order determined by the base sequence of nucleotides in the DNA coding for the protein.
Proteins are required for the structure, function, and regulation of the body's cells, tissues, and organs. Each protein has unique functions. Proteins are essential components of muscles, skin, bones, and the body as a whole.
Examples of proteins include whole classes of important molecules, among them enzymes, hormones, and antibodies.
Proteins are one of the three types of nutrients used as energy sources by the body, the other two being carbohydrates and fat. Proteins and carbohydrates each provide 4 calories of energy per gram, while fats produce 9 calories per gram.
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संबंधित प्रश्न
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 =
Name the life process of an organism that helps in the growth of its population.
Why is diffusion insufficient to meet the oxygen requirements of 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?
Which is the basic requirement of living organisms for obtaining energy?
Which of the following type of energy is used by living organisms to perform vital life processes? Kinetic energy, Chemical energy, Potential energy, Nuclear energy
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 |
Match the terms in column I with their uses in column II
| Column I | Column II |
| (i) Heart | (a) Pipes for transport in humans |
| (ii) Arteries and Veins | (b) Clotting of blood |
| (iii) Xylem vessels | (c) Pumping organ |
| (iv) RBC | (d) Water transport in plants |
| (v) Platelets | (e) Carrier of oxygen |
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 : ____________
Rewrite the food-chain given below with correct sequence.
Grasshopper– Snake– Paddyfield– Eagle– Frog
Complete the following flowchart.
Write definition.
Glycolysis
Give scientific reason.
Oxygen is necessary for complete oxidation of glucose.
Write the forms to which following food materials are converted after digestion.
1.Milk
2. Potato.
3. Oil.
4. Chapati
Answer in detail.
Explain the Kreb's cycle with reaction.
Complete the following chart and state which process of energy production it represents:
Soil fertility is determined by its ability to :
Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain.
Name the organs that form the excretory system in human beings.
What are the main energy sources of living organisms?
Explain the Steps of Glycolysis.
Assertion: When air is passed through lime water, lime water turns milky.
Reason: Air contains 78% nitrogen and 21% oxygen.
How do the guard cells regulate opening and closing of stomatal pores?
Why do fishes die when taken out of water?
In each of the following situations what happens to the rate of photosynthesis?
- Cloudy days
- No rainfall in the area
- Good manuring in the area
- Stomata get blocked due to dust
Classify vitamins according to their solubility.
Give one example of each of the classifications of vitamins.
