Biology

Genetic Engineering and Biotechnology

2,010 Questions

Genetic engineering and biotechnology involve modifying organism DNA to develop transgenic crops, medical treatments, and industrial solutions. This field covers essential techniques like hybridoma technology, molecular markers, and gene transfer in eukaryotic cells. These biology topics are essential for aspirants preparing for various competitive examinations.

Genetic engineering techniquesTransgenic organismsIndustrial biotechnologyGMOs and bioremediation

Genetic Engineering and Biotechnology Questions

Multiple choice

What is the primary goal of genetic engineering in agriculture?

  1. To increase crop yield

  2. To improve crop resistance to pests and diseases

  3. To enhance the nutritional value of crops

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic engineering in agriculture aims to achieve multiple goals, including increasing crop yield, improving crop resistance to pests and diseases, and enhancing the nutritional value of crops.

Multiple choice

Which genetic engineering technique involves inserting a gene from one organism into the genome of another organism?

  1. Gene editing

  2. Transgenesis

  3. Cisgenesis

  4. Gene silencing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transgenesis involves transferring a gene from one organism to another, resulting in the production of a genetically modified organism (GMO).

Multiple choice

What is the term used to describe the process of modifying an organism's genome using gene editing techniques?

  1. Genetic engineering

  2. Genome editing

  3. Transgenesis

  4. Gene silencing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Genome editing refers to the process of making precise changes to an organism's DNA using techniques such as CRISPR-Cas9.

Multiple choice

Which genetic engineering technique involves introducing a gene from a closely related species into the genome of a crop plant?

  1. Gene editing

  2. Transgenesis

  3. Cisgenesis

  4. Gene silencing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cisgenesis involves transferring a gene from a closely related species into the genome of a crop plant, ensuring that the transferred gene is similar to genes already present in the plant.

Multiple choice

What is the term used to describe the process of reducing or eliminating the expression of a specific gene?

  1. Genetic engineering

  2. Genome editing

  3. Transgenesis

  4. Gene silencing
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gene silencing refers to the process of reducing or eliminating the expression of a specific gene, thereby altering the organism's traits.

Multiple choice

Which gene silencing technique utilizes small interfering RNAs (siRNAs) to target and degrade specific mRNAs?

  1. CRISPR-Cas9

  2. TALENs

  3. ZFNs

  4. RNA interference (RNAi)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

RNA interference (RNAi) is a gene silencing technique that employs small interfering RNAs (siRNAs) to target and degrade specific mRNAs, preventing the translation of those mRNAs into proteins.

Multiple choice

What is the term used to describe a genetically modified organism (GMO) that has been engineered to resist a specific herbicide?

  1. Herbicide-tolerant GMO

  2. Insect-resistant GMO

  3. Disease-resistant GMO

  4. Vitamin-enriched GMO
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Herbicide-tolerant GMOs are genetically modified organisms that have been engineered to resist the effects of specific herbicides, allowing farmers to use herbicides without harming the crop.

Multiple choice

Which genetic engineering technique involves inserting a gene from a bacterium into the genome of a crop plant to confer resistance to a specific insect pest?

  1. Gene editing

  2. Transgenesis

  3. Cisgenesis

  4. Gene silencing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transgenesis can be used to insert a gene from a bacterium into the genome of a crop plant, conferring resistance to a specific insect pest.

Multiple choice

What is the term used to describe a genetically modified organism (GMO) that has been engineered to produce a specific vitamin or nutrient?

  1. Herbicide-tolerant GMO

  2. Insect-resistant GMO

  3. Disease-resistant GMO

  4. Vitamin-enriched GMO
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vitamin-enriched GMOs are genetically modified organisms that have been engineered to produce a specific vitamin or nutrient, enhancing the nutritional value of the crop.

Multiple choice

What is the term used to describe a genetically modified organism (GMO) that has been engineered to resist a specific disease?

  1. Herbicide-tolerant GMO

  2. Insect-resistant GMO

  3. Disease-resistant GMO

  4. Vitamin-enriched GMO
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Disease-resistant GMOs are genetically modified organisms that have been engineered to resist a specific disease, reducing crop losses and increasing productivity.

Multiple choice

What is the term used to describe the process of introducing a gene from a distantly related species into the genome of a crop plant?

  1. Gene editing

  2. Transgenesis

  3. Cisgenesis

  4. Gene silencing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transgenesis can also involve introducing a gene from a distantly related species into the genome of a crop plant.

Multiple choice

What is the primary objective of genetic engineering for salt tolerance?

  1. To increase crop yield in saline soils

  2. To improve the taste of crops

  3. To reduce the need for irrigation

  4. To enhance the nutritional value of crops
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Genetic engineering aims to modify plant genes to enable them to withstand high salt concentrations in the soil, thereby increasing crop yield in saline environments.

Multiple choice

Which of the following is a common approach used in genetic engineering for salt tolerance?

  1. Introducing genes that encode salt-tolerant proteins

  2. Modifying existing genes to enhance salt tolerance

  3. Overexpressing genes involved in salt stress response

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic engineering for salt tolerance involves a combination of strategies, including introducing new genes, modifying existing genes, and overexpressing genes related to salt stress response.

Multiple choice

What is the role of salt-tolerant proteins in genetic engineering for salt tolerance?

  1. They help plants absorb more water from the soil

  2. They protect cellular components from salt damage

  3. They regulate ion transport and balance

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Salt-tolerant proteins perform various functions, including water uptake, protection against salt-induced damage, and regulation of ion transport, contributing to overall salt tolerance in plants.

Multiple choice

Which gene is commonly overexpressed in genetic engineering for salt tolerance?

  1. SOS1

  2. NHX1

  3. AKT1

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Overexpression of genes like SOS1, NHX1, and AKT1, involved in ion transport and stress response, has been employed to enhance salt tolerance in plants.