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NCERT Class X Science Class: Chapter – 6. Life Processer – 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

Illustration: NCERT Class X Science Class: Chapter – 6. Life Processer – Part-6

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

Illustration: NCERT Class X Science Class: Chapter – 6. Life Processer – Part-6

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

Illustration: NCERT Class X Science Class: Chapter – 6. Life Processer – Part-6

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

Illustration: NCERT Class X Science Class: Chapter – 6. Life Processer – Part-6

Question 34:

Choose the correct path of urine in our body

(a) Kidney β‡Ύ ureter β‡Ύ urethra β‡Ύ urinary bladder

(b) Kidney β‡Ύ urinary bladder β‡Ύ urethra β‡Ύ ureter

(c) Kidney β‡Ύ ureters β‡Ύ urinary bladder β‡Ύ urethra

(d) Urinary bladder β‡Ύ kidney β‡Ύ ureter β‡Ύ urethra

Answer: C

Illustration: NCERT Class X Science Class: Chapter – 6. Life Processer – Part-6

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