life processes multiple choice questions and answers
Questions
Free download in PDF Life Processes Multiple Choice Questions & Answers for competitive exams. These short objective type questions with answers are very important for competitive exams as well as Board exams. These short solved questions or quizzes are provided by Gkseries.
1
Which of the following statements about the autotrophs is incorrect?
A
They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
B
They store carbohydrates in the form of starch
C
They convert carbon dioxide and water into carbohydrates in the absence of sunlight
D
They constitute the first trophic level in food chains
5
Which of the following statements (s) is (are) true about respiration?
(i) During inhalation, ribs move inward and diaphragm is raised
(ii) In the alveoli, exchange of gases takes place, i.e., oxygen form alveolar air diffuses into blood and carbon dioxide from blood into alveolar air
(iii) Haemoglobin has greater affinity for carbon dioxide than oxygen
(iv) Alveoli increases surface area for exchange of gases
6
Which of the following statement (s) is (are) true about heart?
(i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs
(ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs
(iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts
(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body
8
Choose the correct statement that describes arteries.
A
They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart
B
They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body
C
They have thick elastic walls, blood flows under low pressure carry blood from the heart to various organs of the body
D
They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body
Answer: They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body
9
Oxygen liberated during photosynthesis comes from
18
Which of the following statements (s) is (are) correct?
(i) Pyruvate can be converted into ethanol and carbon dioxide by yeast.
(ii) Fermentation takes place in aerobic bacteria.
(iii) Fermentation takes place in mitochondria.
(iv) Fermentation is a form of anaerobic respiration.
