All questions of Biotechnology and its Applications for NEET Exam

Introduction
The patenting of rice varieties has sparked significant debate, particularly when a U.S. company patents a variety predominantly found in countries like India. Among these varieties, Basmati rice stands out as a notable example.
What is Basmati Rice?
- Basmati rice is known for its unique aroma, long grains, and fluffy texture.
- It has been cultivated in the Indian subcontinent for centuries and is a staple in various traditional dishes.
Patenting Issues
- In the late 1990s, a U.S. company, RiceTec, patented hybrid varieties that they claimed to be Basmati.
- This patent raised concerns among Indian farmers and stakeholders who argued that Basmati is a traditional variety that has been cultivated for generations in India and Pakistan.
Consequences of Patenting
- The patent led to legal battles over the rights to the name "Basmati."
- It highlighted the complexities of intellectual property rights in agriculture, especially concerning indigenous crops.
Conclusion
The case of Basmati rice serves as a significant example of the intersection between traditional agricultural practices and modern patent laws. Despite the patenting attempts, the highest number of Basmati rice varieties continues to be cultivated in India, emphasizing the importance of preserving indigenous agricultural heritage while navigating the challenges posed by globalization and intellectual property rights.

Answer:

Eli Lilly is the company that started selling Humulin in the year 1983.

Explanation:

Humulin is a type of insulin used to treat diabetes, and it was the first genetically engineered drug to be approved by the US Food and Drug Administration (FDA). The development of Humulin was a joint effort between Eli Lilly and Genentech, but Eli Lilly was the company responsible for marketing and selling the drug.

The approval of Humulin in 1982 marked a significant milestone in the field of biotechnology and paved the way for the development of more genetically engineered drugs. Eli Lilly has since continued to be a major player in the diabetes market, developing and marketing other insulin products such as Humalog and Basaglar.

In summary, Eli Lilly started selling Humulin in the year 1983, making it the first genetically engineered drug to be marketed and sold to the public.

Protoplasts

Protoplasts are isolated cells from plants that have had their cell walls digested using enzymes such as cellulase or pectinase. As a result, these cells are left surrounded only by their plasma membranes.

Isolation of Protoplasts

The process of isolating protoplasts involves several steps:

1. Selection of Tissue: Tissue with high cell division capacity, such as meristematic tissue or callus, is typically chosen for protoplast isolation.

2. Enzymatic Treatment: The selected tissue is treated with enzymes like cellulase or pectinase to break down the cell walls. These enzymes break the bonds between the cell wall components, allowing the release of protoplasts.

3. Separation of Protoplasts: After enzymatic treatment, the mixture is filtered to remove undigested cell debris and obtain a suspension of protoplasts. The suspension is then centrifuged to separate the protoplasts from the enzyme solution.

Characteristics of Protoplasts

Protoplasts have several unique characteristics:

1. Cell Wall Absence: The major difference between protoplasts and intact plant cells is the absence of a cell wall in protoplasts. This allows protoplasts to be more easily manipulated and used for various applications.

2. Plasma Membrane Intact: Despite the removal of the cell wall, the plasma membrane surrounding the protoplast remains intact. This membrane plays a vital role in maintaining the integrity and functionality of the protoplast.

3. Regeneration Potential: Protoplasts have the ability to regenerate cell walls and divide, giving rise to new plant cells. This property makes them useful in various applications such as plant breeding, genetic engineering, and protoplast fusion.

Applications of Protoplasts

Protoplasts have a wide range of applications in plant research and biotechnology:

1. Genetic Transformation: Protoplasts can be genetically modified by introducing foreign DNA into their cytoplasm. This allows the transfer of desirable traits, such as disease resistance or increased yield, into plants.

2. Protoplast Fusion: Protoplasts from different plant species or varieties can be fused together to create hybrid cells. This technique is used in plant breeding to combine desirable traits from different plants.

3. Somatic Hybridization: Protoplast fusion can be used to create somatic hybrids, which are plants derived from the fusion of protoplasts from different species. Somatic hybrids can possess novel combinations of traits not found in either parent.

In conclusion, protoplasts are isolated plant cells that have had their cell walls digested, leaving them surrounded by plasma membranes. They are important tools in plant research and biotechnology, with applications ranging from genetic transformation to somatic hybridization.

Broad patent category refers to patents that cover a large category of organisms or genetic material. In this case, the correct answer is option 'B' - Oryza.

Explanation:

- Triticum: It is a genus of plants that includes wheat species. However, it is not a broad patent category as it refers to a specific genus of plants.
- Pissum sativum: It is the scientific name for peas. Similar to Triticum, it refers to a specific plant species and not a broad patent category.
- Brassica: It is a genus of plants that includes several species such as mustard, cabbage, and broccoli. However, it is not a broad patent category as it refers to a specific genus of plants.
- Oryza: It is a genus of plants that includes several species of rice. Oryza has been covered under the broad patent category as it refers to a large category of organisms.

In conclusion, the correct answer is option 'B' - Oryza as it has been covered under the broad patent category.

Test to confirm HIV infection

The doctor in this scenario needs to get tested to confirm if he has contracted HIV. The test that he needs to take is the Polymerase Chain Reaction (PCR) test.

Explanation

PCR is a highly accurate and sensitive test that detects the genetic material (RNA) of the virus in the blood. It can detect the virus even in the early stages of infection before antibodies are produced by the body. This makes it the most reliable test to confirm HIV infection, especially in cases where there is a risk of transmission through accidental exposure like in this scenario.

Other tests like routine urine examination, Total Leukocyte Count (TLC), and Differential Leukocyte Count (DLC) are not specific for HIV and cannot detect the virus. They may indicate an infection or inflammation in the body but cannot confirm HIV.

Therefore, if the doctor wants to rule out or confirm his suspicion of HIV infection, he should undergo PCR testing. Early detection and treatment can significantly improve the quality of life of people living with HIV and prevent the progression of the disease.

Explanation:
During the processing of proinsulin into the mature insulin, the C-peptide is removed from proinsulin.

Proinsulin is a single chain polypeptide consisting of three regions: the N-terminal B-chain, the C-terminal A-chain, and a connecting peptide (C-peptide) in the middle. The connecting peptide or C-peptide is important because it connects the B-chain and A-chain of proinsulin.

During the processing of proinsulin, the C-peptide is cleaved enzymatically from the precursor molecule. This cleavage reaction is catalyzed by proteolytic enzymes called prohormone convertases (PCs) in the secretory granules of pancreatic beta-cells.

Once the C-peptide is removed, the remaining A and B chains of proinsulin are held together by disulfide bonds to form mature insulin. Mature insulin is then secreted into the bloodstream in response to increased glucose levels.

The removal of C-peptide is important for two reasons:

1. Regulation of insulin secretion: C-peptide is co-secreted with insulin in equimolar amounts, and its removal allows for more precise control of insulin secretion.

2. Diagnostic value: C-peptide levels can be measured in blood to assess insulin secretion and to differentiate between type 1 and type 2 diabetes. Since C-peptide has a longer half-life than insulin, measuring C-peptide levels can provide a more accurate assessment of insulin secretion over time.

In conclusion, during the processing of proinsulin into mature insulin, the C-peptide is enzymatically cleaved from the precursor molecule, leaving the A and B chains of insulin held together by disulfide bonds.

The foreign genesc) It could potentially prevent the development of genetic disorders or diseases before they occurd) It could allow for more targeted and precise gene editing, as the cells and tissues are still developing and more malleablee) It could potentially eliminate the need for gene therapy later in life, as the corrected genes would be present from the beginningf) It could potentially improve the overall health and quality of life for individuals with genetic disorders or diseasesg) It could allow for the correction or modification of multiple genes simultaneously, addressing multiple issues at onceh) It could potentially prevent the transmission of genetic disorders or diseases to future generationsi) It could allow for early intervention and personalized treatment plans, leading to better outcomes and prognosis for individuals with genetic disorders or diseases.

Transgenic Animals

Transgenic animals are those animals that have been genetically modified by the insertion of foreign DNA into their genome. This technology is widely used in biomedical research and biotechnology to study gene function, produce medically important proteins, and develop new therapies.

Foreign DNA in all of its cells

The correct answer to the question is option C, which is "Foreign DNA in all of its cells." This means that transgenic animals have foreign DNA integrated into their genome in every cell of their body. This is usually accomplished by injecting foreign DNA into the pronucleus of a fertilized egg, which is then implanted into a surrogate mother.

Applications of Transgenic Animals

Transgenic animals have many applications in biomedical research and biotechnology, including:

1. Production of therapeutic proteins: Transgenic animals can be engineered to produce human proteins that are used in medicine, such as insulin, growth hormones, and clotting factors.

2. Disease modeling: Transgenic animals can be used to model human diseases, such as cancer, Alzheimer's disease, and cystic fibrosis.

3. Gene therapy: Transgenic animals can be used to test and develop gene therapy treatments for genetic diseases.

4. Agricultural applications: Transgenic animals can be engineered to have desirable traits, such as increased milk production or disease resistance.

5. Conservation: Transgenic animals can be used to save endangered species by introducing beneficial genes into their populations.

Conclusion

In conclusion, transgenic animals are those animals that have been genetically modified by the insertion of foreign DNA into their genome. This technology has many applications in biomedical research and biotechnology and has the potential to improve human health and conserve endangered species.

Bb

The polymerase chain reaction (PCR) technique is a powerful tool that allows the amplification of specific DNA sequences. It is widely used in various fields, including medical diagnostics.

PCR can be used to detect bacterial and viral diseases, even when symptoms of the disease are not yet visible. This is because PCR can detect the presence of the pathogen's DNA or RNA in a sample, even at very low concentrations.

PCR works by using specific primers that bind to the target DNA sequence of interest. These primers are designed to be complementary to the pathogen's DNA or RNA, allowing them to selectively amplify the target sequence.

Once the target sequence is amplified, it can be detected using various methods, such as gel electrophoresis or fluorescence-based detection. The presence of the amplified DNA indicates the presence of the pathogen in the sample.

Therefore, statement 1 is correct. PCR technique is indeed helpful in detecting bacterial and viral diseases, even before symptoms of the disease are visible.

bb

One of the key advantages of PCR is its ability to detect very low concentrations of bacteria or viruses in the human body. This is because PCR has the ability to amplify the target DNA or RNA sequence, increasing its concentration.

Even if the concentration of the pathogen's DNA or RNA is extremely low, PCR can amplify it to levels that can be easily detected. This allows for the early detection of infections, even before the symptoms become apparent.

Therefore, statement 2 is also correct. Very low concentrations of bacteria or viruses in the human body can indeed be detected by amplification of their nucleic acids using the PCR technique.

b

In conclusion, both statement 1 and statement 2 are correct. The PCR technique is helpful in detecting bacterial and viral diseases, even when symptoms of the disease are not yet visible. Additionally, very low concentrations of bacteria or viruses in the human body can be detected by amplification of their nucleic acids using PCR. Statement 2 is the correct explanation of statement 1, as PCR's ability to amplify target DNA or RNA sequences allows for the detection of pathogens even at low concentrations.

Importance of Early Diagnosis and Understanding Pathophysiology in Effective Disease Treatment

Early diagnosis and understanding of the pathophysiology of a disease are crucial for effective treatment. Let's explore why.

1. Early Diagnosis
Early diagnosis of a disease allows for prompt treatment, which can improve outcomes and even save lives. When a disease is caught early, it may be easier to treat before it progresses or causes irreversible damage. For example, early detection of cancer can increase the chances of successful treatment and cure. Additionally, early diagnosis can prevent the spread of infectious diseases to others.

2. Understanding Pathophysiology
To effectively treat a disease, it is essential to understand its underlying pathophysiology. Pathophysiology refers to the functional changes that occur in the body as a result of a disease. By understanding the mechanisms of a disease, healthcare providers can tailor treatments to target the specific processes involved. For example, understanding the pathophysiology of asthma can lead to the development of medications that target the airway inflammation and bronchoconstriction that cause asthma symptoms.

3. Importance of Early Diagnosis and Understanding Pathophysiology Together
Early diagnosis and understanding of pathophysiology work together to provide the best possible treatment for a disease. Without early diagnosis, a disease may progress too far for effective treatment. Without understanding pathophysiology, treatments may not effectively target the underlying mechanisms of the disease and may be less effective or even harmful. Together, early diagnosis and understanding pathophysiology can lead to the most effective and tailored treatment plans for each patient.

In conclusion, early diagnosis and understanding pathophysiology are both crucial for effective disease treatment. Without either of these components, treatment may be less effective or even harmful. Therefore, it is essential to prioritize both early diagnosis and understanding pathophysiology in healthcare.

For producing human insulin
c)Transgenic plants for increased resistance to pests and diseases
d)All of the above

The correct answer is d) All of the above. Genetic engineering has been used in various fields including medicine, agriculture, and biotechnology to produce transgenic organisms with desired traits or functions. Transgenic mice have been used for safety testing of vaccines, transgenic cows for producing human insulin, and transgenic plants for increased resistance to pests and diseases.