Life Processes | Chapter Assessment | English | Grade 10

Which part of alimentary canal receives bile from the liver?

• Stomach

• Small intestine

• Large intestine

• Oesophagus

Answer explanation

Bile used to helps in breakdown of fats. Bile is produced in liver and small intestine receives it from liver. Hence option 2 is correct answer.

In which of the following parts exchange of gases takes place during respiration?

• trachea and larynx

• alveoli of lungs

• alveoli and throat

• throat and larynx

Answer explanation

Exchange of gases takes place during respiration from alveoli of lungs.

Which of the following shows correct sequence of parts in human alimentary canal? A : Mouth, B : Stomach, C: Small intestine, D : oesophagus, E : Large intestine.

• A → B → C→ D → E

• A → D → B → E → C

• A → B → D → C → E

• A → D → B → C → E

Answer explanation

As we know that correct sequence of parts in human alimentary canal is Mouth → oesophagus → stomach → small intestine → large intestine This is correctly mention in option 4, hence it is correct answer.

Which of the following event does not occur in the process of photosynthesis?

• Absorption of light energy by chlorophyll

• Conversion of carbon dioxide to carbohydrates

• Conversion of carbon to carbon dioxide

• Conversion of light energy to chemical energy

Answer explanation

As during photosynthesis oxidation of carbon to carbon dioxide does not occurs. All other process occur during photosynthesis. Hence, option 3 is correct answer.

Which of the following will be affected if salivary amylase is lacking in the saliva?

• Proteins breaking down into amino acids

• Starch breaking down into sugars

• Fats breaking down into fatty acids and glycerol

• Absorption of vitamins

Answer explanation

Amylase is enzyme which breaks down starch into simple sugar hence if salivary amylase is lacking in saliva and starch breaking down into sugars will be affected.

Which is the first enzyme to mix with food in the digestive tract?

• Pepsin

• Cellulose

• Trypsin

• Amylase

Answer explanation

As digestive track starts from mouth, so salivary amylase is first enzyme to mix with food in the digestive tract. Hence option 4 is correct answer

Which of the following protects the inner lining of stomach from hydrochloric acid?

• Pepsin

• Bile

• Mucus

• Salivary amylase

Answer explanation

Mucus is secreted by mucous cells which protects the inner lining of stomach from gastric enzymes and hydrochloric acid.

Cricketers and players often develop cramps due to lack of oxygen in muscles. Which of the following must be the reason of it?

• conversion of pyruvate to ethanol

• conversion of pyruvate to glucose

• non conversion of glucose to pyruvate

• conversion of pyruvate to lactic acid

Answer explanation

Conversion of pyruvate to lactic acid during anaerobic respiration, cricketers and players are often leads to cramps due to lack of oxygen in muscles.

Choose the incorrect statement about respiration. Statement 1: During inhalation, ribs moves upward and outward, and the diaphragm moves downward. Statement 2: Haemoglobin has greater affinity for carbon dioxide than oxygen Statement 3: Alveoli increase surface area for exchange of gases

• Statement 1

• Statement 2

• Statement 3

• None of these

Answer explanation

As haemoglobin has greater affinity towards oxygen than carbon dioxide Statement 2 is incorrect And hence option 2 is correct answer.

Choose the incorrect relation from following.

• Transportation : Liver

• Respiration : Lungs

• Excretion : Kidney

• Nutrition : Stomach

Answer explanation

As transportation is related to heart, in option 1 it is mentioned as wrongly. Hence, option 1 is correct answer.