The term 'cell' was coined by: MCQ with Answer and Explanation

The term 'cell' was coined by:
A. Rudolf Virchow
B. Robert Brown
C. Antonie van Leeuwenhoek
D. Robert Hooke
Answer: Option D
Solution (By JKExamLibrary)
Robert Hooke observed thin slices of cork under a microscope he designed and saw honeycomb-like compartments which he termed 'cells' in his 1665 book 'Micrographia'. Leeuwenhoek discovered living cells (bacteria, protozoa). Brown discovered the nucleus (1831), and Virchow proposed that all cells arise from pre-existing cells (1855). Hooke's cells were dead, empty cell walls of cork.

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Practice More Biology Questions

Question #1
Which of the following is the largest part of the human brain?
A. Cerebrum
B. Cerebellum
C. Thalamus
D. Medulla oblongata

Correct Answer: Option A


Explanation:
The cerebrum is the largest and most prominent part of the brain, divided into left and right hemispheres, responsible for higher functions like thought, memory, and voluntary movement. The cerebellum coordinates movement, medulla controls vital functions.

This question belongs to: Science Biology
Question #2
Consider statements about vitamins: 1. Vitamin A is fat-soluble. 2. Vitamin C is water-soluble. 3. Vitamin D deficiency causes scurvy. Which are correct?
A. 1, 2 and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only

Correct Answer: Option B


Explanation:
Vitamins A, D, E, and K are fat-soluble vitamins, meaning they are absorbed along with fats in the diet and can be stored in the body's fatty tissue and liver. Vitamin C and the B-complex vitamins are water-soluble, meaning they dissolve in water and are not stored in significant amounts. Vitamin D deficiency causes rickets in children and osteomalacia in adults; scurvy is caused by Vitamin C deficiency. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology
Question #3
The 'Central Dogma' of molecular biology, which describes the flow of genetic information, was proposed by:
A. Francis Crick
B. Marshall Nirenberg
C. James Watson
D. Severo Ochoa

Correct Answer: Option A


Explanation:
The Central Dogma of molecular biology was proposed by Francis Crick in 1958. It describes the fundamental flow of genetic information within a biological system: DNA is transcribed into RNA, and RNA is translated into protein. The flow is typically unidirectional: DNA -> RNA -> Protein. While exceptions exist (like reverse transcription in retroviruses, where RNA -> DNA), the central dogma remains the core principle of gene expression.

This question belongs to: Science Biology