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

Which crop has been successfully modified using gene editing to increase its resistance to a specific pest?

  1. Rice

  2. Corn

  3. Soybean

  4. Wheat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scientists have successfully used gene editing to create rice plants that are resistant to the brown planthopper, a major pest that causes significant crop losses in Asia. This was achieved by introducing a gene that produces a protein toxic to the pest.

Multiple choice

How can gene editing help improve the nutritional value of crops?

  1. Increasing vitamin content

  2. Reducing antinutrients

  3. Enhancing protein quality

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

Gene editing can be used to increase the levels of essential vitamins and minerals in crops, reduce the content of antinutrients that interfere with nutrient absorption, and improve the quality of proteins by increasing their digestibility and amino acid composition.

Multiple choice

What is the term used to describe crops that have been genetically modified using gene editing techniques?

  1. Transgenic crops

  2. Genetically modified organisms (GMOs)

  3. Genome-edited crops

  4. Cisgenic crops
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Genome-edited crops are those that have been modified using gene editing techniques, resulting in precise changes to their DNA. They differ from transgenic crops, which are modified by introducing foreign genes from other organisms.

Multiple choice

What is the main advantage of gene editing over traditional breeding methods in agriculture?

  1. Faster and more precise

  2. Cost-effective

  3. Environmentally friendly

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

Gene editing offers the advantage of being faster and more precise than traditional breeding methods. It allows scientists to make targeted changes to specific genes, resulting in predictable and heritable traits in crops.

Multiple choice

What is the main concern raised by opponents of gene editing in agriculture?

  1. Potential risks to human health

  2. Environmental risks

  3. Loss of biodiversity

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

Opponents of gene editing in agriculture raise concerns about potential risks to human health, such as allergies or toxicity, as well as environmental risks, such as the potential for gene-edited crops to cross-pollinate with wild relatives and impact biodiversity.

Multiple choice

Which international organization is responsible for developing guidelines and standards for the safe use of gene editing in agriculture?

  1. World Health Organization (WHO)

  2. Food and Agriculture Organization (FAO)

  3. International Atomic Energy Agency (IAEA)

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

The Food and Agriculture Organization (FAO) of the United Nations is responsible for developing guidelines and standards for the safe use of gene editing in agriculture, including risk assessment and management.

Multiple choice

What is the term used to describe gene editing techniques that involve inserting or replacing genes in a genome?

  1. Knock-in

  2. Knock-out

  3. Gene activation

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

Knock-in refers to gene editing techniques that involve inserting or replacing genes in a genome, allowing for the addition of new traits or the modification of existing ones.

Multiple choice

Which gene editing technique involves disrupting or inactivating a specific gene?

  1. Knock-in

  2. Knock-out

  3. Gene activation

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

Knock-out refers to gene editing techniques that involve disrupting or inactivating a specific gene, resulting in the loss of its function.

Multiple choice

What is the term used to describe gene editing techniques that increase the expression of a specific gene?

  1. Knock-in

  2. Knock-out

  3. Gene activation

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

Gene activation refers to gene editing techniques that increase the expression of a specific gene, resulting in higher levels of the corresponding protein.

Multiple choice

Which gene editing technique involves reducing or silencing the expression of a specific gene?

  1. Knock-in

  2. Knock-out

  3. Gene activation

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

Gene silencing refers to gene editing techniques that reduce or silence the expression of a specific gene, resulting in lower levels of the corresponding protein.

Multiple choice

What is the term used to describe gene editing techniques that involve modifying the regulatory regions of a gene?

  1. Knock-in

  2. Knock-out

  3. Gene activation

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

Gene regulation refers to gene editing techniques that involve modifying the regulatory regions of a gene, such as promoters or enhancers, to control its expression.

Multiple choice

Which gene editing technique involves introducing a gene from one organism into another?

  1. Knock-in

  2. Knock-out

  3. Gene transfer

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

Gene transfer refers to gene editing techniques that involve introducing a gene from one organism into another, allowing for the transfer of specific traits or characteristics.

Multiple choice

Which type of immunotherapy involves the use of genetically modified T cells to target cancer cells?

  1. Adoptive cell therapy

  2. Immune checkpoint inhibitors

  3. Cancer vaccines

  4. Antibody-drug conjugates
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Adoptive cell therapy involves genetically modifying a patient's own T cells to express receptors that recognize specific antigens on cancer cells. These modified T cells are then re-infused into the patient's body, where they can effectively target and destroy cancer cells.

Multiple choice

What is the ethical dilemma posed by the use of genetically modified organisms (GMOs)?

  1. The potential risks to human health and the environment

  2. The loss of biodiversity

  3. The patenting of GMOs by corporations

  4. The impact on traditional farming practices
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The ethical dilemma posed by the use of GMOs is the potential risks to human health and the environment, as well as the loss of biodiversity and the impact on traditional farming practices.

Multiple choice

Which technique is used to generate induced pluripotent stem cells (iPSCs)?

  1. Nuclear transfer

  2. Somatic cell nuclear transfer

  3. Reprogramming

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

iPSCs are generated through a process called reprogramming, where mature cells are converted back to a pluripotent state by introducing specific factors.