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Class 10 Science Chapter 5 Assertion and Reason Questions - Life Processes

Q1:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): HCl converts pepsinogen into active enzyme pepsin.

Reason (R): Pepsin converts protein into proteoses and peptones.

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Q2:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Assertion (A): Muscles of stomach wall possess thick layers of muscle fibers.

Reason (R): These muscles help in mixing the food with the enzymes present in the alimentary canal.

View Solution

Q3:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Assertion (A): Photosynthesis is an anabolic process.

Reason (R): The process of photosynthesis occurs in chlorophyll.

View Solution

Q4:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Humans are not truly aerobic.

Reason (R): They produce lactic acid anaerobically.

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Q5:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Alveoli contain an extensive network of blood vessels.

Reason (R): Alveoli is the site where exchange of gases occurs.

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Q6:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): The muscular walls of ventricles are thicker than auricles.

Reason (R): This helps in preventing the back flow of blood.

View Solution

Q7:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Valves are present in the arteries.

Reason (R): Arteries carry oxygenated blood from heart to different body parts except pulmonary artery.

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Q8:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Excretory unit of kidneys are nephrons.

Reason (R): It has no role in secretion of urine.

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Q9:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): In humans, a major amount of water is absorbed by the tubular part of nephron.

Reason (R): Absorption of water depends on the dissolved waste to be excreted from the body.

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Q10:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Raw materials needed for photosynthesis are carbon dioxide, water and minerals.

Reason : Nutrients provide energy to an organism.

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Q11:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Transpiration is a necessary evil.

Reason : It causes water loss but helps in absorption and upward movement of water and minerals.

View Solution

Q12:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Digestion breaks large complex molecules to simple smaller molecules which can be easily absorbed.

Reason : Digestion is necessary for the absorption of all molecules.

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Q13:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : During physiology of excretion, deamination does not take place in the liver.

Reason : Deamination is a process to make use of excess amino acids which cannot be incorporated into protoplasm.

View Solution

Q14:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : The muscular walls of ventricles are thicker than auricles.

Reason : This helps in preventing the backflow of blood.

View Solution

Q15:

Question for Assertion & Reason Type Questions: Life Processes
Try yourself: Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : In woody plants, gaseous exchange occurs through lenticels.

Reason : Lenticels are specialised cells found along with stomata on the stem of woody plants.

View Solution

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