Science, asked by prachitikadam591, 9 months ago

2. Write definitions.
a. Nutrition. b. Nutrients
c. Proteins. d. Cellular respiration
e. Aerobic respiration.
f. Glycolysis.​

Answers

Answered by krs1000024519
11

Answer:

a.Nutrition is about eating a healthy and balanced diet. Food and drink provide the energy and nutrients you need to be healthy. Understanding these nutrition terms may make it easier for you to make better food choices.

b.Nutrients are molecules in food that all organisms need to make energy, grow, develop, and reproduce. Nutrients are digested and then broken down into basic parts to be used by the organism. There are two main types of nutrients, macronutrients and micronutrients. The three main categories of macronutrients include carbohydrate, protein, and fat. The two types of micronutrients are vitamins and minerals, and these are extra molecules that cells need to make energy. Let's take a look at the three groups of macronutrients we mentioned.

c.Proteins are macromolecules formed by amino acids. Proteins are large size molecules (macromolecules), polymers of structural units called amino acids. A total of 20 different amino acids exist in proteins and hundreds to thousands of these amino acids are attached to each other in long chains to form a protein.

d.Cellular respiration is the aerobic process by which living cells break down glucose molecules, release energy, and form molecules of ATP. Overall, this three-stage process involves glucose and oxygen reacting to form carbon dioxide and water.

e.Aerobic respiration is the aerobic catabolism of nutrients to carbon dioxide, water, and energy, and involves an electron transport system in which molecular oxygen is the final electron acceptor. Most eukaryotes and prokaryotes use aerobic respiration to obtain energy from glucose.

f. Glycolysis is the process by which one molecule of glucose is converted into two molecules of pyruvate, two hydrogen ions and two molecules of water. Through this process, the 'high energy' molecules of ATP and NADH are synthesised. The pyruvate molecules then proceed to the link reaction, where acetyl-coA is produced.

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Answered by ltsmeAliya
1

Answer:

a. Nutrition:

  • Food is needed by all living organisms for growth and repair.
  • Variety of substances are taken as food from single cellular organisms like Amoeba to the complex multicellular organisms like the human body.
  • The method of taking food by organism is called nutrition.

b. Nutrients:

  • A nutrient is a substance which is used by an organism to survive, grow, and reproduction.
  • Living organisms obtained nutrients from the food.
  • Carbohydrates, fats, proteins, vitamins, minerals, etc., are the nutrients obtained from food.

c. Proteins:

  • Proteins are the large complex molecules formed by bonding together many amino acids by peptide bonds.
  • Examples, hair, nail muscles are proteins.

d. Cellular respiration:

  • Cellular respiration is the process by which cells get their energy in the form of ATP from oxidation of food.
  • Cellular respiration takes place in presence or in absence of oxygen.

e. Aerobic respiration:

  • It is the process of producing cellular energy by the oxidation of food such as glucose in the presence of oxygen.
  • It is a multistep process that produces 38 ATP.

f. Glycolysis:

  • Glycolysis is the first step in cellular respiration.
  • It takes place in the cytoplasm of a cell.
  • In this process 1 molecule of glucose is converted into 2 molecules of pyruvic acid or pyruvate.
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