TOP
Main page
Books
Next
Biology MCQ Practice 15 — Science Foundation Course for Class 11 & 12
Answers
Score
Reset
1.
The process of water absorption by roots is mainly:
(a) Active transport
(b) Osmosis
(c) Diffusion
(d) Imbibition
Show Answer & Explanation
Correct Answer: (b) Osmosis
Explanation:
Water moves by osmosis from soil to root cells
2.
The organelle that contains hydrolytic enzymes is:
(a) Mitochondria
(b) Lysosome
(c) Ribosome
(d) Golgi apparatus
Show Answer & Explanation
Correct Answer: (b) Lysosome
Explanation:
Lysosomes are called suicidal bags
3.
The hormone that prepares the body for emergency is:
(a) Insulin
(b) Adrenaline
(c) Thyroxine
(d) Oxytocin
Show Answer & Explanation
Correct Answer: (b) Adrenaline
Explanation:
Adrenaline is the fight-or-flight hormone
4.
The tissue that conducts food in plants is:
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Collenchyma
Show Answer & Explanation
Correct Answer: (b) Phloem
Explanation:
Phloem transports organic food
5.
The process of cell division that reduces chromosome number is:
(a) Mitosis
(b) Meiosis
(c) Binary fission
(d) Budding
Show Answer & Explanation
Correct Answer: (b) Meiosis
Explanation:
Meiosis produces haploid gametes
6.
The respiratory pigment in human blood is:
(a) Myoglobin
(b) Haemoglobin
(c) Chlorophyll
(d) Haemocyanin
Show Answer & Explanation
Correct Answer: (b) Haemoglobin
Explanation:
Haemoglobin transports oxygen
7.
The basic unit of heredity is:
(a) Chromosome
(b) Gene
(c) DNA
(d) Nucleus
Show Answer & Explanation
Correct Answer: (b) Gene
Explanation:
Gene is the unit of heredity
8.
The largest gland in the human body is:
(a) Pancreas
(b) Liver
(c) Thyroid
(d) Pituitary
Show Answer & Explanation
Correct Answer: (b) Liver
Explanation:
Liver performs many metabolic functions
9.
The pigment responsible for photosynthesis is:
(a) Haemoglobin
(b) Chlorophyll
(c) Melanin
(d) Carotene
Show Answer & Explanation
Correct Answer: (b) Chlorophyll
Explanation:
Chlorophyll absorbs light energy
10.
The functional unit of the kidney is:
(a) Neuron
(b) Nephron
(c) Alveolus
(d) Sarcomere
Show Answer & Explanation
Correct Answer: (b) Nephron
Explanation:
Nephron filters blood and forms urine