Q: Which of the following best describes the central dogma of molecular biology?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which of the following statements best summarizes the contributions of Robert Hooke to cell biology?

Accepted Answer

He coined the term 'cell' after observing cork compartments under a microscope.

Question 2

Which of the following is NOT one of the three main strands of modern cell biology?

Accepted Answer

Physiology

Question 3

A scientist wants to separate cellular organelles based on their size and density. Which technique should they use?

Accepted Answer

Subcellular fractionation using centrifugation

Question 4

Which of the following best describes the resolving power of a microscope?

Accepted Answer

The ability to distinguish two closely spaced objects as separate

Question 5

Which historical event provided the first experimental evidence that 'hereditary factors' are located on chromosomes?

Accepted Answer

Sutton and Boveri's chromosome theory of heredity

Question 6

A researcher is using a microscope that can achieve a resolution of 0.1 nm. Which type of microscope is most likely being used?

Accepted Answer

Transmission electron microscope (TEM)

Question 7

Which of the following units would be most appropriate for measuring the diameter of a ribosome?

Accepted Answer

Nanometer ($$1 \ \mathrm{nm})$$

Question 8

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 9

Which of the following is a key advantage of confocal microscopy over traditional brightfield microscopy?

Accepted Answer

It allows for optical sectioning and produces sharper images by eliminating out-of-focus light.

Question 10

A scientist wants to separate proteins based on their size and charge. Which technique should they use?

Accepted Answer

Electrophoresis

Question 11

Which of the following statements is NOT part of the classical cell theory?

Accepted Answer

Cells can spontaneously generate from non-living matter.

Question 12

Which scientist is credited with synthesizing urea in the laboratory, demonstrating that organic molecules can be made from inorganic precursors?

Accepted Answer

Friedrich Wöhler

Question 13

A researcher is studying the passage of hereditary factors in pea plants. Which scientist's work is most directly related to this research?

Accepted Answer

Gregor Mendel

Question 14

Which of the following best describes the main focus of cytology?

Accepted Answer

The study of cellular structure using optical techniques

Question 15

A scientist uses a microtome in their research. What is the primary purpose of this instrument?

Accepted Answer

To prepare very thin slices of biological samples for microscopy

Question 16

Which of the following is a real-world application of recombinant DNA technology?

Accepted Answer

Cloning a gene to produce insulin in bacteria

Question 17

Which of the following best explains why electron microscopes have higher resolving power than light microscopes?

Accepted Answer

Electrons have a much shorter wavelength than visible light.

Question 18

A scientist is interested in analyzing the entire set of proteins expressed in a cell under specific conditions. Which field of study does this represent?

Accepted Answer

Proteomics

Question 19

Which of the following best describes the main advantage of using model organisms in cell biology research?

Accepted Answer

They are well-characterized, easy to manipulate, and provide insights applicable to other species.

Question 20

Which of the following equations correctly represents the conversion between micrometers and nanometers?

Accepted Answer

$$1 \ \mu m = 10$$^{3}$$ \ \mathrm{nm}$$

CH 1 - A Preview of Cell Biology: Foundations, Microscopy, and the Emergence of Modern Cell Biology

Guida di studio - Domande di pratica

Study guide - Flashcard