Question 1

Which of the following statements best describes the main contribution of Robert Hooke to cell biology?

Accepted Answer

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

Question 2

A scientist is using a microscope to observe a structure that is 150 nm in diameter. Which type of microscope would be most appropriate for clearly resolving this structure?

Accepted Answer

Transmission electron microscope

Question 3

Which of the following best explains why the discovery by Fredrich Wöhler in 1828 was significant for the field of biochemistry?

Accepted Answer

He showed that organic compounds could be synthesized from inorganic substances, challenging the idea that life was governed by unique 'vital forces'.

Question 4

A researcher wants to separate proteins in a mixture based on their size and charge. Which combination of techniques would be most effective?

Accepted Answer

Chromatography and electrophoresis

Question 5

Which of the following statements about the central dogma of molecular biology is correct?

Accepted Answer

It describes the flow of genetic information as DNA $$\rightarrow$$ RNA $$\rightarrow$$ protein.

Question 6

A scientist is using CRISPR genome editing to introduce a specific mutation into a gene. Which of the following steps is essential for ensuring the mutation is incorporated at the target site?

Accepted Answer

Including a repair template for homology-directed repair after introducing a double-stranded break

Question 7

Which of the following best describes the difference between in vivo and in vitro experiments?

Accepted Answer

In vivo experiments are performed in living organisms, while in vitro experiments are performed outside living organisms, such as in test tubes.

Question 8

A student is measuring the diameter of a bacterial cell and finds it to be 2 $$\mum. $$How many nanometers (nm) is this equivalent to?

Accepted Answer

$$2 	imes 10^3$ nm

Question 9

Which of the following is a key advantage of using model organisms in cell biology research?

Accepted Answer

They are well-characterized, easy to manipulate, and allow for the study of fundamental biological processes.

Question 10

A scientist is using fluorescence microscopy to study the localization of a protein in living cells. Which of the following is most likely being used to visualize the protein?

Accepted Answer

A green fluorescent protein (GFP) fusion to the protein of interest

Question 11

Which of the following statements about the limit of resolution is correct?

Accepted Answer

A smaller limit of resolution means a microscope can distinguish objects that are closer together.

Question 12

Which of the following best describes the role of restriction enzymes in recombinant DNA technology?

Accepted Answer

They cut DNA at specific sequences, allowing for the creation of recombinant DNA molecules.

Question 13

A researcher is using mass spectrometry in a proteomics study. What is the primary purpose of this technique?

Accepted Answer

To determine the size and composition of individual proteins

Question 14

Which of the following is an example of a scientific hypothesis?

Accepted Answer

If yeast cells are deprived of glucose, their rate of fermentation will decrease.

Question 15

A scientist is designing an experiment to test the effect of a new drug on cell division. Which of the following should be considered the independent variable?

Accepted Answer

The concentration of the new drug applied to the cells

Question 16

Which of the following statements about scientific 'facts' is most accurate according to the philosophy of science described in the study materials?

Accepted Answer

Scientific facts are provisional and may change as new evidence emerges.

Question 17

Which of the following best describes the function of tRNA in the process of protein synthesis?

Accepted Answer

It brings the appropriate amino acid to the ribosome during translation.

Question 18

A cell biologist is using subcellular fractionation to isolate mitochondria from liver cells. Which principle allows this technique to separate organelles?

Accepted Answer

Organelles are separated based on their size and density using centrifugation.

Question 19

Which of the following is a correct statement about the use of bioinformatics in modern cell biology?

Accepted Answer

Bioinformatics combines computer science and biology to analyze large datasets, such as genome sequences.

A Preview of Cell Biology: Foundations, Methods, and Model Systems

Guida di studio - Domande di pratica

Study guide - Flashcard