Default Title

Question (11)

QN0036032

Two organisms obtain food differently. Organism X breaks down food outside its body and then absorbs it, while organism Y takes food inside and digests it. Which pair could represent X and Y respectively?

(A) Bread mould and human
(B) Human and mushroom
(C) Amoeba and bread mould
(D) Cow and yeast

Correct Answer: A

Explanation:

Fungi such as bread mould digest food externally, whereas animals generally take food into the body and digest it internally.

Link:

Report Error

Question (12)

QN0036033

An Amoeba surrounds a food particle using temporary finger-like extensions. What happens next?

(A) The food enters the nucleus
(B) A food vacuole is formed
(C) The food immediately leaves the cell
(D) The food enters the mitochondria

Correct Answer: B

Explanation:

The extensions of Amoeba fuse around the food particle to form a food vacuole.

Link:

Report Error

Question (13)

QN0036034

A Paramoecium has a definite shape and takes food at a specific location. Which structure helps bring food towards this location?

(A) Villi
(B) Cilia
(C) Stomata
(D) Nephrons

Correct Answer: B

Explanation:

Cilia covering the surface of Paramoecium move food towards its specific feeding spot.

Link:

Report Error

Question (14)

QN0036035

A student adds saliva to starch solution in test tube A but not in test tube B. After 20–30 minutes, iodine is added. Why would test tube A show less blue-black colour?

(A) Saliva converts starch into simpler sugar
(B) Saliva produces starch
(C) Iodine destroys starch
(D) Water converts starch into protein

Correct Answer: A

Explanation:

Salivary amylase breaks down starch into simpler sugar.

Link:

Report Error

Question (15)

QN0036036

If peristaltic movement of the alimentary canal stopped, which process would be directly affected?

(A) Movement of food through the digestive tube
(B) Formation of red blood cells
(C) Oxygen absorption in alveoli
(D) Urine storage

Correct Answer: A

Explanation:

Rhythmic muscular contractions called peristalsis push food forward through the alimentary canal.

Link:

Report Error

Question (16)

QN0036037

Why does the stomach release hydrochloric acid along with pepsin?

(A) Acid provides a suitable medium for pepsin
(B) Acid converts fats directly into glucose
(C) Acid absorbs digested food
(D) Acid carries oxygen to cells

Correct Answer: A

Explanation:

Hydrochloric acid creates an acidic medium that facilitates the action of pepsin.

Link:

Report Error

Question (17)

QN0036038

A person has reduced secretion of bile into the small intestine. Which digestion process would be particularly affected?

(A) Protein digestion only
(B) Fat digestion
(C) Starch digestion in the mouth
(D) Water absorption in the large intestine

Correct Answer: B

Explanation:

Bile salts break large fat globules into smaller globules, increasing the efficiency of enzyme action.

Link:

Report Error

Question (18)

QN0036039

The small intestine is highly coiled and is the longest part of the alimentary canal. Why is this arrangement useful?

(A) It provides greater opportunity for digestion and absorption
(B) It prevents food from entering the stomach
(C) It stops all movement of food
(D) It produces red blood cells

Correct Answer: A

Explanation:

The small intestine is specialised for complete digestion and absorption of nutrients.

Link:

Report Error

Question (19)

QN0036040

Suppose the villi of the small intestine were greatly reduced in number. What would most directly decrease?

(A) Surface area available for absorption
(B) Production of saliva
(C) Movement of the diaphragm
(D) Formation of urine

Correct Answer: A

Explanation:

Villi increase the surface area of the intestinal lining for absorption of digested food.

Link:

Report Error

Question (20)

QN0036041

A herbivore and a carnivore of similar body size are compared. The herbivore generally has a longer small intestine. Why?

(A) Grass is easier to digest than meat
(B) Cellulose-rich food requires more time for digestion
(C) Meat contains no nutrients
(D) Carnivores do not have intestines

Correct Answer: B

Explanation:

Herbivores eating grass require a longer small intestine because cellulose takes longer to digest.

Link:

Report Error

Question (11)

Two organisms obtain food differently. Organism X breaks down food outside its body and then absorbs it, while organism Y takes food inside and digests it. Which pair could represent X and Y respectively?

Explanation:

Link:

Question (12)

An Amoeba surrounds a food particle using temporary finger-like extensions. What happens next?

Explanation:

Link:

Question (13)

A Paramoecium has a definite shape and takes food at a specific location. Which structure helps bring food towards this location?

Explanation:

Link:

Question (14)

A student adds saliva to starch solution in test tube A but not in test tube B. After 20–30 minutes, iodine is added. Why would test tube A show less blue-black colour?

Explanation:

Link:

Question (15)

If peristaltic movement of the alimentary canal stopped, which process would be directly affected?

Explanation:

Link:

Question (16)

Why does the stomach release hydrochloric acid along with pepsin?

Explanation:

Link:

Question (17)

A person has reduced secretion of bile into the small intestine. Which digestion process would be particularly affected?

Explanation:

Link:

Question (18)

The small intestine is highly coiled and is the longest part of the alimentary canal. Why is this arrangement useful?

Explanation:

Link:

Question (19)

Suppose the villi of the small intestine were greatly reduced in number. What would most directly decrease?

Explanation:

Link:

Question (20)

A herbivore and a carnivore of similar body size are compared. The herbivore generally has a longer small intestine. Why?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY