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NCERT Class X Science Class: Chapter β 6. Life Processer β Part-6
Question 30:
Choose the forms in which most plants absorb nitrogen
(i) Proteins
(ii) Nitrates and Nitrites
(iii) Urea
(iv) Atmospheric nitrogen
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)
Answer: B
Question 31:
Which is the first enzyme to mix with food in the digestive tract?
(a) Pepsin
(b) Cellulose
(c) Amylase
(d) Trypsin
Answer: C
Question 32:
Which of the following statement (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
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)
Answer: C
Question 33:
Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
(a) Conversion of pyruvate to ethanol
(b) Conversion of pyruvate to glucose
(c) Non conversion of glucose to pyruvate
(d) Conversion of pyruvate to lactic acid
Answer: D
Question 34:
Choose the correct path of urine in our body
(a) Kidney βΎ ureter βΎ urethra βΎ urinary bladder
(b) Kidney βΎ urinary bladder βΎ urethra βΎ ureter
(c) Kidney βΎ ureters βΎ urinary bladder βΎ urethra
(d) Urinary bladder βΎ kidney βΎ ureter βΎ urethra
Answer: C
Question 35:
During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
(a) Cytoplasm
(b) Chloroplast
(c) Mitochondria
(d) Golgi body
Answer: A