The type of root that grows from the stem or leaves is called: MCQ with Answer and Explanation

The type of root that grows from the stem or leaves is called:
A. Fibrous root
B. Adventitious root
C. Primary root
D. Taproot
Answer: Option B
Solution (By JKSSB Mock Tests)
Adventitious roots arise from non-root tissues like stems, leaves, or branches. Examples: prop roots of banyan, stilt roots of maize, aerial roots of orchids. Taproot and fibrous roots develop from the radicle.

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Practice More Biology Questions

Question #1
Thyroxine hormone is produced by the:
A. Pituitary gland
B. Thyroid gland
C. Adrenal gland
D. Parathyroid gland

Correct Answer: Option B


Explanation:
Thyroxine (T₄) and triiodothyronine (T₃) are synthesized by thyroid follicular cells. They regulate basal metabolic rate, growth, and development. Iodine is essential for their synthesis.

This question belongs to: Science Biology
Question #2
The genetic material in humans is organized as:
A. A single circular chromosome
B. Only mitochondrial DNA
C. Multiple linear chromosomes in the nucleus
D. RNA molecules

Correct Answer: Option C


Explanation:
Human cells have 46 linear chromosomes in the nucleus (22 pairs of autosomes and one pair of sex chromosomes), made of DNA and histone proteins. Mitochondria also contain small circular DNA. Prokaryotes have a single circular chromosome. RNA is not the primary genetic material in humans.

This question belongs to: Science Biology
Question #3
In human digestive system, the enzyme that digests fats is:
A. Lipase
B. Amylase
C. Pepsin
D. Sucrase

Correct Answer: Option A


Explanation:
Lipase is the fat-digesting enzyme, produced mainly by the pancreas (pancreatic lipase) and also by lingual and gastric glands. It hydrolyzes triglycerides into monoglycerides and free fatty acids. Bile salts emulsify fats, increasing surface area for lipase action. Amylase digests starch, pepsin digests proteins, sucrase hydrolyzes sucrose. Lipase requires colipase for optimal activity.

This question belongs to: Science Biology