Question 1

Which of the following best defines biotechnology?

Accepted Answer

The use of living organisms or their systems to develop or make products.

Question 2

What is the primary function of a vector in recombinant DNA technology?

Accepted Answer

To carry foreign DNA into a host cell for replication and expression.

Question 3

Which of the following statements about restriction enzymes is correct?

Accepted Answer

Restriction enzymes recognize specific DNA sequences and cut DNA at those sites.

Question 4

A scientist wants to amplify a specific DNA segment from a small sample. Which technique should they use?

Accepted Answer

Polymerase Chain Reaction (PCR)

Question 5

Which equation best represents the exponential amplification of DNA during PCR, where $$n is $$the number of cycles?

Accepted Answer

$$N = 2^n$$

Question 6

Which method is commonly used to introduce recombinant DNA into a bacterial cell?

Accepted Answer

Transformation

Question 7

What distinguishes cDNA from synthetic DNA?

Accepted Answer

cDNA is made from mRNA using reverse transcriptase, while synthetic DNA is chemically synthesized.

Question 8

Which of the following is NOT a method used to locate a clone in a library?

Accepted Answer

PCR amplification

Question 9

RNA interference (RNAi) is best described as:

Accepted Answer

A process by which small RNA molecules inhibit gene expression by destroying specific mRNA.

Question 10

Which of the following is a major benefit of genome projects?

Accepted Answer

They provide comprehensive genetic information that can be used for medical, agricultural, and scientific advancements.

Question 11

Which technique is used to transfer DNA from a gel to a membrane for hybridization with a probe?

Accepted Answer

Southern blotting

Question 12

Which of the following best describes DNA fingerprinting?

Accepted Answer

A technique that analyzes unique patterns in DNA to identify individuals.

Question 13

Agrobacterium tumefaciens is used in genetic engineering primarily because:

Accepted Answer

It can transfer genes into plant cells via its Ti plasmid.

Question 14

Which of the following is a potential ethical concern regarding gene modification?

Accepted Answer

Unintended consequences such as ecological disruption or health risks.

Question 15

A scientist is using a plasmid vector with an antibiotic-resistance gene to select for bacteria that have taken up recombinant DNA. What is the principle behind this selection?

Accepted Answer

Only bacteria with the plasmid survive in the presence of the antibiotic.

Question 16

Which of the following best describes shotgun sequencing?

Accepted Answer

Randomly breaking DNA into fragments, sequencing them, and assembling the sequences computationally.

Question 17

Which of the following is NOT a typical application of DNA technology?

Accepted Answer

Direct conversion of DNA into proteins without transcription or translation.

Question 18

Which formula would you use to calculate the number of DNA molecules after $$n$$ cycles of PCR, starting with a single molecule?

Accepted Answer

$$N = 2^n$$

Question 19

Which of the following best describes the role of bioinformatics in modern microbiology?

Accepted Answer

The use of computational tools to analyze and interpret biological data, such as DNA sequences.

Question 20

A researcher wants to analyze the protein expression profile of a microorganism. Which field should they use?

Accepted Answer

Proteomics

Biotechnology & DNA Technology: Key Concepts and Applications

Study Guide - Practice Questions

Study Guide - Flashcards