Free Cell Structure and Function MCQs with Answers
2,478 Cell Structure and Function MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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Read the Cell Structure and Function notesFree MDCAT chapter notes with key terms2,478 questions · page 80 of 124
- A. Genes
- B. Nucleotides
- C. Nucleosomes
- D. Base pairs
Explanation: Nucleosomes appear as 'beads on a string' in the chromosomes when viewed under an electron microscope.
Correct answer: Nucleosomes1582. Having studied your paper carefully, I am convinced that neither of your answers ---- correct.
- A. Is
- B. Are
- C. Is being
- D. Are being
Explanation: The correct answer is is because 'neither' is a singular pronoun that requires a singular verb form.
Correct answer: Is- A. must
- B. who
- C. from
- D. the
Explanation: The error in the sentence is in option (B) "who." It should be corrected to "that" to properly refer to a work area.
Correct answer: who- A. Oh
- B. Hi
- C. Bravo
- D. Regrettably
Explanation: Alas is a term used to express grief, pity or concern thus, regrettably.
Correct answer: Regrettably- A. Only conclusion I follows
- B. Only conclusion II follows
- C. Neither I nor II follows
- D. Both conclusions I and II follow
Explanation: The statements establish that stresses and strains are an inherent part of life and that they have a negative impact.
Correct answer: Only conclusion II follows- A. 18
- B. 15
- C. 21
- D. 20
Explanation: This is an alternating series. The first series (1, 3, 6, 10, 15) increases by +2, +3, +4, +5.
Correct answer: 21- A. True
- B. False
- C. Uncertain
- D. None of these
Explanation: The first two statements establish the speed order: Lily > Mara > Gail. Based on this, Lily is the fastest runner.
Correct answer: False- A. Ribosome
- B. Nucleoplasm
- C. Cytoplasm
- D. Nucleolus
Explanation: The maximum formation of mRNA occurs in the nucleolus. The nucleolus is a dense region within the nucleus that is responsible for ribosome…
Correct answer: Nucleolus1589. Polysome is formed by:
- A. A Ribosome with several subunits
- B. Ribosomes attached to each other in a linear arrangement
- C. Several Ribosomes attached to a single mRNA
- D. Many Ribosomes attached to a strand of endoplasmic reticulum
Explanation: Ribosomes may occur in rosettes or helical groups called polyribosomes or polysomes (Gk. Poly- many, soma-body).
Correct answer: Several Ribosomes attached to a single mRNA- A. Genome, chromosome, gene, nucleotide
- B. Chromosome, genome, nucleotide, gene
- C. Chromosome, gene, genome, nucleotide
- D. Genome, chromosome, nucleotide, gene
Explanation: In the genome, all the genes are contained in a single set of chromosomes. The instructions in our genome are present in the form of DNA.
Correct answer: Genome, chromosome, gene, nucleotide- A. 60%
- B. 80%
- C. 40%
- D. Very small
Explanation: Chromosomes are composed of DNA and histone proteins. Most are about 40 % DNA and 60 % histone proteins.
Correct answer: 40%- A. Euchromatin
- B. Bio Chromatin
- C. Heterochromatin
- D. Nuclear Chromatin
Explanation: Heterochromatin and euchromatin are two types of chromatin. The key difference between heterochromatin and euchromatin is the packaging.
Correct answer: Euchromatin- A. Alanine and glycine
- B. Tyrosine and cysteine
- C. Arginine and lysine
- D. Histidine and serine
Explanation: Histones are rich in basic amino acids (lysine & arginine), binding tightly to negatively charged DNA.
Correct answer: Arginine and lysine- A. 6
- B. 14
- C. 8
- D. 16
Explanation: The mosquito genome has 3 pairs (6 total) chromosomes.
Correct answer: 6- A. Sea urchin
- B. Drosophila
- C. Salamander
- D. Penicillium
Explanation: Walther Flemming, a German embryologist, was the first person to systematically observe and describe the behaviour of chromosomes during…
Correct answer: Salamander1596. Histones are linked to:
- A. Nitrogenous base of DNA
- B. Phosphate of DNA
- C. Sugar of DNA
- D. All of these
Explanation: Histones (positively charged proteins) bind with the negatively charged phosphate groups of DNA backbone, helping in packaging DNA into…
Correct answer: Phosphate of DNA- A. Statement I is the cause and statement II is its effect
- B. Statement II is the cause and statement I is its effect
- C. Both Statement I and II are independent causes
- D. Both Statement I and II are effects of independent causes.
Explanation: The massive scale of pollution (Statement I) is the problem or cause. The expected penalty from a control organization (Statement II) is…
Correct answer: Statement I is the cause and statement II is its effect- A. Only I follows
- B. Only II follows
- C. Either I or II follows
- D. Neither I nor II follows
Explanation: The statement highlights that many engineering graduates leave Pakistan for better opportunities.
Correct answer: Neither I nor II follows- A. 1.O mm. 250X
- B. 2.0 mm. 250X
- C. 2.0 um, 500X
- D. 1.O um, 500X
Explanation: Resolution of the human eye is 1.0mm. Resolution of compound microscope is 2.0um that is 500X of human eye.
Correct answer: 2.0 um, 500X- A. Organ>function>cell>tissue
- B. Cell>organ>tissue>function
- C. Cell>tissue>organ>system
- D. Tissue>organ>cell>function
Explanation: The correct sequence of the structural organization of the human body is: Cell → tissue → organ → organ system.
Correct answer: Cell>tissue>organ>system