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Life Processes - 1 (Class X)

Description: Life Processes - 1
Number of Questions: 15
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Tags: Life Processes - 1 Animal Tissues Permanent Tissues Nutrition and Its Types Respiration in Plants and Animals Life Processes Transportation in Plants and Animals Excretion in Plants and Animals
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Which of the following statements is/are correct?

a. The left side of the heart pumps blood only into the lungs. b. The two sides of the heart are separated completely by a partition. c. Arteries carry blood from heart to body organs.

  1. Only a

  2. Only b

  3. Only c

  4. Both b and c

  5. Both a and b

Show answer
Correct Option: D
Explanation:

This is the correct answer as both statements b and c are correct.  This option is incorrect as statement a is incorrect. The left ventricle of the heart pumps blood to the entire body.

Match the following:

Name of the enzymes Functions
a. Enzyme amylase 1. It breaks down the emulsified fats.
b. Enzyme trypsin 2. It digests the proteins.
c. Enzyme lipase 3. It breaks down the starch.

  1. a - 3, b - 1, c - 2

  2. a - 3, b - 2, c - 1

  3. a - 2, b - 3, c - 1

  4. a - 2, b - 1, c - 3

  5. a - 1, b - 2, c - 3

Show answer
Correct Option: B
Explanation:

This is the correct option. Enzyme amylase breaks down the starch. Enzyme trypsin digests the proteins. Enzyme lipase breaks down the emulsified fats.

___________ contains glomeruli, which filter the blood passing through it.

  1. Bowman's capsule

  2. Tubule

  3. Ureter

  4. Urethra

  5. Bladder

Show answer
Correct Option: A
Explanation:

Bowman's capsule is a cup-like sac at the beginning of the tubular component of a nephron.

Match the following:

a. Renal artery 1. It carries impure blood into the kidneys.
b. Renal vein 2. They are the tubes that carry urine from kidneys to bladder.
c. Ureters 3. It carries pure blood out of the kidneys.

  1. a - 1, b - 3, c - 2

  2. a - 1, b - 2, c - 3

  3. a - 2, b - 1, c - 3

  4. a - 3, b - 1, c - 2

  5. a - 2, b - 3, c - 1

Show answer
Correct Option: A
Explanation:

This is the correct option. Renal arteries carry blood containing waste into the kidneys. Renal veins drain pure blood out of the kidneys after filtration. Ureters are the tubes that carry urine from the kidneys to the bladder.

Match the following:

a. Arteries 1. They are thin-walled and extremely narrow tubes or blood vessels which help in exchanging various materials between the blood and the body cells.
b. Capillaries 2. They are the thick-walled blood vessels which carry blood from the heart to all parts of the body.
c. Veins 3. They are the thin-walled blood vessels which carry blood from all parts of the body back to the heart.

  1. a - 2, b - 3, c - 1

  2. a - 1, b - 2, c - 3

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 1, c - 3

  5. a - 3, b - 1, c - 2

Show answer
Correct Option: D
Explanation:

This is the correct option. Arteries are the thick-walled blood vessels which carry blood from the heart to all parts of the body. Capillaries are thin-walled and extremely narrow tubes or blood vessels which help in exchanging various materials between the blood and the body cells. Veins are the thin-walled blood vessels which carry blood from all parts of the body back to the heart. This is a wrong option. Arteries are the thick-walled blood vessels which carry blood from the heart to all parts of the body. Capillaries are thin-walled and extremely narrow tubes or blood vessels which help in exchanging various materials between the blood and the body cells. Veins are the thin-walled blood vessels which carry blood from all parts of the body back to the heart.

Raphides are a form of plants' wastes that can be found in their

  1. stems

  2. leaves

  3. fruits

  4. bark

  5. roots

Show answer
Correct Option: C
Explanation:

This is the correct answer as some plant waste gets stored in fruits of plants in the form of solid bodies. Raphides are needle-shaped crystals of calcium oxalate as monohydrate or calcium carbonate as aragonite, found in more than 200 families of plants.

Which of the following statements is/are correct?

a. Aerobic respiration takes place in the absence of oxygen. b. Mitochondrion is the site for aerobic respiration in cells. c. Pyruvate is converted to ethanol and carbon dioxide or lactic acid during aerobic respiration.

  1. a only

  2. b only

  3. c only

  4. a and c

  5. a and b

Show answer
Correct Option: B
Explanation:

This is the correct answer as this statement is true.

Which of the following statements is/are correct?

a. All plants are autotrophs. b. Bacteria are not autotrophic. c. Autotrophs make their food with inorganic substances.

  1. Only a

  2. Only b

  3. Only c

  4. Both a and b

  5. Both b and c

Show answer
Correct Option: C
Explanation:

This is correct as autotrophs make their food from carbon dioxide and water. Carbon dioxide and water are inorganic substances.

The stomach walls contain three tubular glands that secrete gastric juice. Gastric juice contains which of the following substances?

a. Hydrochloric acid b. Enzyme pepsin c. Enzyme trypsin d. Mucus

  1. Only a, b and d

  2. Only a, b and c

  3. Only a, c and d

  4. Only b, c and d

  5. All of the above

Show answer
Correct Option: A
Explanation:

This is the correct answer. Gastric juice contains hydrochloric acid, enzyme pepsin and mucus.

Which of the following is/are elongated cell(s) responsible for water transport?

  1. Parenchyma

  2. Fibres

  3. Tracheids

  4. Sieve tubes

  5. Endodermis

Show answer
Correct Option: C
Explanation:

This is the correct answer is tracheids are long and thin. They transport water.

The upper chambers of the heart are called

  1. aorta

  2. vena cava

  3. atria

  4. pericardium

  5. ventricles

Show answer
Correct Option: C
Explanation:

This is the correct answer. Atria are the two upper cavities of the heart from which blood is passed to the ventricles. 

Which of the following statements is/are false?

a. The gaseous exchange in plants takes place through the stomata in leaves. b. In addition to leaves, stomata are also present in the roots of the plant. c. In most broad-leaved plants, stomata occur only in the lower surface of the leaf.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c

Show answer
Correct Option: C
Explanation:

Stomata are minute aperture structures on plants found typically on the outer leaf. They are also known as the epidermis.

______ use(s) holozoic mode of nutrition.

  1. Roundworms

  2. Tapeworms

  3. Plasmodium

  4. Amoeba

  5. Fungi

Show answer
Correct Option: D
Explanation:

This is the correct answer as amoeba uses holozoic mode of nutrition.

_______ form(s) the floor of the chest cavity in humans.

  1. Lungs

  2. Tracheae

  3. Bronchi

  4. Diaphragm

  5. Larynx

Show answer
Correct Option: D
Explanation:

This is the correct answer. Diaphragm forms the floor of the chest cavity in humans.

Where does the whole process of anaerobic respiration take place?

  1. Mitochondria

  2. Ribosomes

  3. Cytoplasm

  4. Nucleus

  5. Endoplasmic reticulum

Show answer
Correct Option: C
Explanation:

Anaerobic respiration occurs in the cytoplasm of cells.

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