Class X Science
Subject: Biology___Objective Question
Chapter 1: Life Processes
Q. 1. In Photosynthetic process, atmospheric carbon di oxide is _______ to carbohydrates(A) oxidised
(B) Reduced
(C) Neutralised
(D) Burnt
Right Ans:- Reduced
Q. 2. When water enters the guard cells the stomata
(A) Opens
(B) Closes
(C) Open or closes
(D) No
Right Ans:- Opens
Q. 3. On seeing good food our mouth waters. This fluid is actually
(A) Water
(B) Hormone
(C) Enzyme
(D) None of the above
Right Ans:- Enzyme
Q. 4. The enzyme Pepsin is inactive in stomach without the presence of
(A) Nitric Acid
(B) Hydrochloric acid
(C) Acetic acid
(D) Butyric acid
Right Ans:- Hydrochloric acid
Q. 5. Villi present on the inner lining of the intestinal wall
(A) Secretes enzymes for digestion
(B) Secretes hormones
(C) Decreases the surface area for absorption
(D) Increases the surface area for absorption
Right Ans:- Increases the surface area for absorption
Q. 6. पDuring cellular respiration one molecule of glucose is first broken down into two molecules of ________
(A) Acetic acid
(B) Pyruvic acid
(C) Lactic acid
(D) None of the above
Right Ans:- Pyruvic acid
Q. 7. Rajib was absent in the class because of muscle pain which he claims to be due to excess physical exercise he had done yesterday. This pain is due to
(A) Formation of lactic acid
(B) Formation of acetic acid
(C) Formation of Pyruvic acid
(D) Formation of Hydrochloric acid
Right Ans:- Formation of lactic acid
Q. 8. Right part of the human heart contains
(A) Oxygenated blood
(B) Mixed blood
(C) Deoxygenated blood
(D) No blood
Right Ans:- Deoxygenated blood
Q. 9. The transport of soluble products of photosynthesis is called translocation and it occurs in the part of the vascular tissue called
(A) Xylem
(B) Sclerenchyma
(C) Phloem
(D) Collenchyma
Right Ans:- Phloem
Q. 10. In human each kidney has large numbers of filtration units called ___
(A) Neutrons
(B) Neurons
(C) Neptune
(D) Nephrons
Right Ans:- Nephrons
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