The process by which plants absorb water from the soil is primarily through: MCQ with Answer and Explanation

The process by which plants absorb water from the soil is primarily through:
A. Root hairs
B. Stem
C. Leaves
D. Flowers
Answer: Option A
Solution (By JKSSB Mock Tests)
Root hairs, unicellular extensions of epidermal cells in the root maturation zone, greatly increase surface area for water and mineral absorption from the soil. Water enters by osmosis. Leaves absorb some water through stomata but primarily lose water. The stem transports, and flowers are reproductive.

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Practice More Biology Questions

Question #1
The organism that causes the disease 'anthrax' is:
A. Bacillus anthracis
B. Streptococcus pyogenes
C. Vibrio cholerae
D. Salmonella typhi

Correct Answer: Option A


Explanation:
Anthrax is a zoonotic disease caused by the spore-forming bacterium Bacillus anthracis. It can infect skin, lungs, and gastrointestinal tract. Streptococcus pyogenes causes strep throat, Salmonella typhi typhoid, Vibrio cholerae cholera. Anthrax spores can survive for decades in soil and have been used as a bioweapon.

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

Correct Answer: Option D


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
The organelle that processes and packages proteins for secretion is the:
A. Ribosome
B. Rough endoplasmic reticulum
C. Lysosome
D. Golgi apparatus

Correct Answer: Option D


Explanation:
The Golgi apparatus modifies, sorts, and packages proteins and lipids into vesicles for transport to their destinations (secretion, plasma membrane, lysosomes). Ribosomes synthesize proteins, rough ER folds and transports them, lysosomes digest materials.

This question belongs to: Science Biology