Question 1

Which of the following best describes the role of restriction enzymes in the process of creating genetically modified organisms (GMOs)?

Accepted Answer

They cut DNA molecules at specific sequences, creating fragments with sticky ends that can bond with complementary DNA.

Question 2

A forensic scientist needs to analyze a small blood sample from a crime scene. Which sequence of biotechnological techniques would be most appropriate to identify the suspect?

Accepted Answer

Use PCR to amplify the DNA, then use gel electrophoresis to separate the fragments and create a DNA fingerprint.

Question 3

Which of the following is a key difference between reproductive cloning and therapeutic cloning?

Accepted Answer

In reproductive cloning, the embryo is placed into a surrogate mother to develop into an organism, while in therapeutic cloning, the embryo is used to produce tissues in a petri dish.

Question 4

During gel electrophoresis, why do shorter DNA fragments move faster through the gel than longer fragments?

Accepted Answer

Shorter fragments experience less resistance as they migrate toward the positive electrode.

Question 5

A goat has been genetically modified to produce spider silk proteins in its milk. Which biotechnology technique was most likely used to achieve this?

Accepted Answer

Insertion of the spider silk gene into the goat's genome using recombinant DNA technology.

Question 6

Which of the following best explains why PCR is a powerful tool in forensic science?

Accepted Answer

PCR can amplify tiny amounts of DNA, making it possible to analyze even trace evidence from crime scenes.

Question 7

A scientist wants to produce a cow that is an exact genetic copy of a prize-winning animal. Which sequence of steps would be used in reproductive cloning?

Accepted Answer

Retrieve DNA from the donor, remove the nucleus from an egg cell, fuse the donor DNA with the enucleated egg, and implant the embryo into a surrogate mother.

Question 8

Which of the following is a correct application of stem cells in biotechnology?

Accepted Answer

Producing new tissues for medical treatments by signaling stem cells to differentiate.

Question 9

Why are plasmids useful in genetic engineering?

Accepted Answer

They can carry foreign genes into bacterial cells, allowing for the expression of new traits.

Question 10

Which process is used to determine the exact sequence of nucleotides in a DNA molecule?

Accepted Answer

DNA sequencing, which involves denaturing DNA into single strands and reading the nucleotide order.

Question 11

A plant is engineered to resist pests by inserting a gene from a bacterium. Which of the following best describes this plant?

Accepted Answer

A genetically modified organism (GMO) containing DNA from another species.

Question 12

Which of the following steps is NOT part of the polymerase chain reaction (PCR) process?

Accepted Answer

Cutting DNA with restriction enzymes.

Question 13

A researcher wants to analyze the genetic differences between two individuals. Which combination of techniques would provide the most detailed comparison?

Accepted Answer

Sequencing the entire genomes of both individuals.

Question 14

Which of the following best explains how PCR and gel electrophoresis are used together to create a DNA fingerprint?

Accepted Answer

PCR amplifies specific DNA regions, and gel electrophoresis separates the resulting fragments by size to produce a unique pattern.

Question 15

Which of the following is a real-world application of bacterial transformation?

Accepted Answer

Producing human growth hormone to treat stunted growth.

Question 16

A scientist extracts stem cells from bone marrow and places them in a petri dish with specific signals. What is the likely goal of this experiment?

Accepted Answer

To induce the stem cells to differentiate into a specific tissue type for medical use.

Question 17

Which of the following statements about restriction enzymes is correct?

Accepted Answer

They cut DNA at specific sequences, creating fragments with sticky or blunt ends.

Question 18

In the context of biotechnology, what is the main advantage of using plasmids in bacterial transformation?

Accepted Answer

Plasmids can carry and express foreign genes in bacteria, enabling the production of useful proteins.

Question 19

Which of the following best describes the process of sequencing an entire genome?

Accepted Answer

Extracting DNA, fragmenting it, and determining the order of nucleotides in each fragment to reconstruct the complete sequence.

Biotechnology Techniques and Applications: Study Guide

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