Nutrition in Plants And Animals Test

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Nutrition in Plants And Animals Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not necessary for carrying out the process of photosynthesis?

A
Sunlight

B
Chlorophyll

C
Oxygen

D
Carbon dioxide

Solution

Oxygen is not required for carrying out the process of photosynthesis.
Question 2
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Plants have a high nitrogen requirement to synthesise proteins. This is made possible with the help of bacterium Rhizobium. Which of the following statements is incorrect for Rhizobium?

A
It converts atmospheric nitrogen into a soluble form that plants can absorb.

B
It can make its own food.

C
It lives in the root nodules of leguminous plants.

D
Legumes provide food and shelter to Rhizobium.

Solution

Rhizobia are bacteria that fix nitrogen after becoming established inside root nodules of legumes. Rhizobium cannot make its own food.
Question 3
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Directions: Read the statements given below and choose the correct option accordingly.

Statement 1: Saprotrophs get food from decaying organic matter.
Statement 2: They release enzymes over decaying organic matter to absorb nutrients.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

B
Both statements 1 and 2 are true, but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true, but statement 2 is false.

D
Both statements 1 and 2 are false.

Solution

Both the given statements are true. Saprotrophs get food from decaying organic matter. They release enzymes over decaying organic matter to absorb nutrients.
Question 4
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The picture given below is of pitcher plant. Which part of the plant is modified in the form of a pitcher?

A
Flower

B
Root

C
Leaf

D
Stem

Solution

Pitcher plants are several different carnivorous plants, which have modified leaves known as pitfall traps- a prey-trapping mechanism featuring a deep cavity filled with digestive liquid.
Question 5
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Observe the part X of the plant shown in the figure given above. It helps in performing

A
photosynthesis

B
respiration

C
transpiration

D
All of the above

Solution

Stomata are responsible for gaseous exchange occurring during photosynthesis and respiration. Loss of water during transpiration also occurs through stomata.
Question 6
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A destarched leaf on a potted plant was covered with black (A), white (B) and transparent (C) strips of paper as shown in the figure.

After six hours of exposure to sunlight, the leaf was removed from the plant and tested for starch. Which one of the following would be the correct observation?

A
The whole leaf turns blue-black.

B
Only portions B and C turn blue-black.

C
Only portions A and B remain colourless, while the rest of the leaf turns blue-black.

D
Portions A, B and C remain colourless, while the rest of the leaf turns blue-black.

Solution

The portion of leaf covered by transparent strip allows sunlight to pass through and hence, photosynthesis occurs there. It will therefore give a positive iodine test for the presence of starch.
Question 7
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The process of photosynthesis is represented as:

A + Water B + Oxygen

What are A and B?

A
A: Carbon dioxide, B: Glucose

B
A: Sodium, B: Sugar

C
A: Glucose, B: Carbon dioxide

D
A: Sugar, B: Calcium

Solution

Carbon dioxide is taken in through the stomata. The product formed is glucose, which is stored in the form of starch in the plant.
Question 8
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Which of the following options contains terms that relate to Chlorophyll, Sun, Oxygen and Iodine, respectively?

A
Green pigment, Energy source, Given out in photosynthesis, Starch

B
Energy source, Given out in photosynthesis, Starch, Green pigment

C
Green pigment, Energy source, Starch, Given out in photosynthesis

D
Energy source, Starch, Given out in photosynthesis, Green pigment

Solution

Chlorophyll is a green pigment, sun is the ultimate source of energy, oxygen is given out in photosynthesis, and iodine is used to detect starch.
Question 9
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Which organisms form the symbiotic association called Lichen?

A
Plant root + bacteria

B
Plant root + fungus

C
Plant root + algae

D
Algae + fungus

Solution

Lichen is the symbiotic association between algae and fungus. Fungus benefits from algae because it provides food and alga benefits from fungus as it supplies moisture and nutrients and also gives protection to alga.
Question 10
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The food particles taken up by the animals are complex as shown in figure 'A' and are broken down into smaller molecules like 'B'. What is this process called?

A
Digestion

B
Respiration

C
Excretion

D
Nutrition

Solution

The figure shows the process of digestion. In chemical digestion, enzymes break down the food into small molecules the body can use.
Question 11
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Refer to the diagram given below:

The mode of nutrition depicted is:

A
Parasitic

B
Holozoic

C
Autotrophic

D
Saprophytic

Solution

Nutrition in amoeba is holozoic. Thus, solid food particles are ingested, which are then acted upon by enzymes and digested.
Question 12
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You have just put a piece of bread in your mouth. The enzyme that will be secreted in the saliva to begin its digestion is:

A
Pepsin

B
Gastrin

C
Trypsin

D
Amylase

Solution

Carbohydrate digestion begins in the mouth by the action of salivary amylase. Bread is a source of carbohydrates. Hence, its digestion begins in the mouth.
Question 13
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The given set of figures shows different types of teeth. Which of these is/are used for biting and cutting of food?

A
A only

B
B only

C
Both A and C

D
Both C and D

Solution

A: Incisor - Biting and cutting
B: Canine - Piercing and tearing
C: Premolar - Grinding and crushing
D: Molar - Grinding and crushing
Question 14
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Which of the following statements is INCORRECT?

A
The tongue aids in the digestion of the food.

B
The saliva changes some of the starch in the food to sugar.

C
The tongue keeps the food in place in the mouth while the food is being chewed.

D
The digestive juices can react more easily with the food when chewed.

Solution

Tongue does not help in the process of digestion. It helps in mixing the food with the saliva. The tongue also keeps the food in place in the mouth while the food is being chewed.
Question 15
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Read carefully the terms given below. Which of the following is the correct combination of organs that do not carry out any digestive functions?

A
Oesophagus, Large intestine, Rectum

B
Buccal cavity, Oesophagus, Rectum

C
Buccal cavity, Oesophagus, Large intestine

D
Small intestine, Large intestine, Rectum

Solution

Oesophagus, large intestine and rectum do not carry out any digestive functions. Digestion of carbohydrates starts in the buccal cavity. Carbohydrates, fats and proteins are digested in the small intestine.
Question 16
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Which of the following is/are NOT a component of gastric juice?

A
Mucus

B
HCl

C
Bile

D
Enzymes

Solution

Bile is not a constituent of gastric juice. Bile is produced by the liver, and stored and concentrated in the gall bladder. Bile helps in the emulsification of fats.
Question 17
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Which of the following is responsible for storing bile?

A
Liver

B
Gall bladder

C
Pancreas

D
Stomach

Solution

Bile is produced by the liver, and stored and concentrated in the gall bladder.
Question 18
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The digestive system processes food into usable and unusable materials. The usable materials are sent to the body's cells as food. What happens to unusable materials?

A
They go into the pancreas to await disposal.

B
They go into the right ventricle to await disposal.

C
They go into the large intestine to await disposal.

D
They go into the small intestine to await disposal.

Solution

The undigested food material that is not absorbed in the small intestine passes into the large intestine. Here, water is absorbed and the remaining waste material is stored as faeces before being removed by defecation.
Question 19
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Which of the following organs stores the faecal matter in the body?

A
Anus

B
Large intestine

C
Rectum

D
Appendix

Solution

The rectum is the final segment of the large intestine that connects the colon to the anus. It stores the faecal matter produced in the colon until the body is ready to eliminate the waste through the process of defecation.
Question 20
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Cellulose-rich food substances are good source of roughage in human beings because

A
human beings do not have cellulose-digesting enzymes

B
cellulose gets absorbed in the human blood and converts into fibres

C
the cellulose-digesting bacteria convert cellulose into fibres

D
cellulose breaks down into smaller components which are egested as roughage

Solution

Cellulose and other types of fibre are components of plants that the human body cannot break down and absorb. When eaten, cellulose passes through the gastrointestinal tract relatively intact.