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 84 of 124
- A. Walter Sutton
- B. Hershy and Chase
- C. Fred Griffith
- D. Karl Correns
Explanation: Additional evidence supporting Avery's conclusion was provided in 1952 by Alfred Hershey and Martha Chase, who experimented with…
Correct answer: Hershy and Chase- A. S34
- B. S35
- C. P31
- D. P32
Explanation: The 32P label was transferred to the interior of the bacteria and was found in viruses subsequently released from the infected bacteria.
Correct answer: P32- A. Walter Sutton
- B. Rosalind Franklin
- C. F. Miescher
- D. Karl Correns
Explanation: A German Chemist, Friedrich Miescher, discovered DNA in 1869, only four years after Mendel's work was published.
Correct answer: F. Miescher- A. P.A. Levene
- B. Walther Fleming
- C. F. Miescher
- D. Watson and Crick
Explanation: In the 1920s, the basic structure of nucleic acids was determined by the biochemist P.A.Levene.
Correct answer: P.A. Levene- A. P.A. Levene
- B. Walther Fleming
- C. F. Miescher
- D. Watson and Crick
Explanation: James Watson and Francis Crick, two young researchers at the University of Cambridge, quickly worked out a likely structure of the DNA…
Correct answer: Watson and Crick- A. Dispersive
- B. Conservative
- C. Semi-conservative
- D. None of the above
Explanation: The dispersive model predicted that parental DNA would completely break and that each strand of all the daughter molecules would be a…
Correct answer: Dispersive- A. P.A. Levene
- B. Meselson - Stahl
- C. F. Miescher
- D. Watson and Crick
Explanation: Meselson and Stahl interpreted their results as follows: after the first round of replication, each daughter DNA duplex was a hybrid…
Correct answer: Meselson - Stahl- A. Carbon
- B. Phosporus
- C. Sulphur
- D. Nitrogen
Explanation: Meselson and Stahl grew bacteria in radioactive isotope of nitrogen, N15.
Correct answer: Nitrogen- A. DNA polymerase I
- B. Primase
- C. Ligase
- D. DNA polymerase II
Explanation: When the polymerase reaches the 5' end of the lagging strand, it binds with another enzyme called DNA ligase, which then connects the…
Correct answer: Ligase- A. DNA polymerase III
- B. Ligase
- C. Primase
- D. DNA polymerase II
Explanation: The true E.coli replicating enzymes is DNA polymerase III which is 10 times larger and far more complex in structure.
Correct answer: DNA polymerase III- A. DNA polymerase I
- B. Pirmase
- C. Ligase
- D. DNA polymerase II
Explanation: DNA polymerase I is a relatively small enzyme that plays a supporting role in DNA replication.
Correct answer: DNA polymerase I- A. 2
- B. 3
- C. 4
- D. 5
Explanation: During elongation, an enzyme called DNA polymerase adds DNA nucleotides to the 3' end of the template.
Correct answer: 3- A. Leading strand
- B. Lagging strand
- C. Both (A) and (B)
- D. None of the above
Explanation: Leading strand, which elongates toward the replication fork, is built up simply by adding nucleotides continuously to its growing 3' end.
Correct answer: Leading strand- A. 100-200 nucleotide
- B. 200-300 nucleotide
- C. 300-400 nucleotide
- D. 400-500 nucleotide
Explanation: Okazaki fragments are about 100 - 200 nucleotides long in eukaryotes and 1000 - 2000 nucleotides long in prokaryotes.
Correct answer: 100-200 nucleotide1675. Okazaki fragment is a:
- A. RNA
- B. DNA
- C. Protein
- D. Enzyme
Explanation: The term "Okazaki fragment" refers to short, newly synthesized DNA fragments formed on the lagging strand during DNA replication.
Correct answer: DNA- A. DNA polymerase I
- B. Pirmase
- C. Ligase
- D. DNA polymerase III
Explanation: Each Okazaki fragment is synthesized by DNA polymerase III in 5' → 3' direction, beginning at the replication fork and moving away from it.
Correct answer: DNA polymerase III- A. Beadle and Tatum
- B. Meselson - Stahl
- C. Garrod and Bateson
- D. Watson and Crick
Explanation: Explanation for this question will be added soon!
Correct answer: Garrod and Bateson- A. Beadle and Tatum
- B. Meselson - Stahl
- C. Garrod and Bateson
- D. Watson and Crick
Explanation: Beadle and Tatum exposed Neurospora spores to X-rays, expecting that DNA in some of these spores would experience damage in the regions…
Correct answer: Beadle and Tatum- A. Hemophilia
- B. Anemia
- C. Alkaptonuria
- D. Tay Sach's disease
Explanation: In normal individuals, homogentisic acid is broken down into simpler substances.
Correct answer: Alkaptonuria- A. Sugar
- B. Ammonia
- C. Enzymes
- D. Vitamins
Explanation: Beadle and Tatum prepared a minimal medium which included sugar, ammonia, salt and vitamins but enzyme was absent.
Correct answer: Enzymes