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16 Questions

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Uzma Chapter 1 mcq_with_answers

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Questions and Answers

Which of the following is a significant contribution of HeLa cells to medical science?

Discovery of DNA structure

Development of the polio vaccine (correct)

Invention of the electron microscope

Development of the first antibiotic

What makes viruses a significant tool in cancer research?

They are used to develop antibiotics.

They help in understanding the molecular basis of cancer. (correct)

Viruses are the leading cause of all human cancers.

They are used in developing pain medications.

What is a key advantage of using fluorescence microscopy in cell biology?

It allows for the observation of cells at atomic resolution.

It enables specific molecules within cells to be visualized. (correct)

It is the only method that can be used to view live cells.

Fluorescence microscopy is mainly used for observing plant cells.

Subcellular fractionation is a technique used to:

Separate cellular components based on size and density. Signup and view all the answers

FRAP (Fluorescence Recovery After Photobleaching) is a technique used to:

Observe the movement and diffusion of proteins within live cells. Signup and view all the answers

Which model organism has been pivotal in understanding the genetics of development?

Drosophila melanogaster (fruit fly) Signup and view all the answers

In cell biology, GFP (Green Fluorescent Protein) tagging is used to:

Tag specific proteins to observe their location and movement within cells. Signup and view all the answers

The study of which virus led to the discovery of oncogenes?

Rous sarcoma virus Signup and view all the answers

Which type of microscopy would be most appropriate for observing the detailed internal structure of a virus?

Electron microscopy Signup and view all the answers

Which of the following best describes the role of viruses in cancer research?

Certain viruses are known to be direct causes of specific types of cancer. Signup and view all the answers

Subcellular fractionation allows researchers to:

Analyze the biochemical properties of different cell organelles. Signup and view all the answers

In cell biology, what is the primary use of model organisms like C. elegans and Drosophila?

To understand fundamental biological processes Signup and view all the answers

What is a primary reason for using E. coli in genetic research?

It has a fast growth rate and simple genetics. Signup and view all the answers

Which of the following is a key characteristic of HeLa cells that has made them particularly useful in research?

They are immortal, meaning they can divide indefinitely in culture. Signup and view all the answers

Fluorescence Resonance Energy Transfer (FRET) is primarily used to:

Measure the distance between two molecules within cells. Signup and view all the answers

Why is Arabidopsis thaliana a popular model organism in plant biology?

It has a small genome and a short life cycle. Signup and view all the answers