Science Notes

VIRUS 🦠🦠🦠🦠 Some virus related MCQ with answers  1. ** Which of the following is a characteristic of a lytic cycle in viruses?    a) Integration into the host genome    b) Production of viral particles inside the host cell    c) Host cell remains alive    d) Formation of a latent infection    - ** Answer:** b) Production of viral particles inside the host cell 2. * *HIV targets which type of cells in the human body?    a) Red blood cells    b) Neurons    c) T-helper cells    d) Platelets    - ** Answer:** c) T-helper cells 3. ** Which of the following is NOT a way viruses can be transmitted ?    a) Direct contact    b) Contaminated water    c) Genetics    d) Airborne droplets    - ** Answer:** c) Genetics 4. ** Which virus is responsible for causing chickenpox?    a) Varicella-zoster virus    b) Epstein-Barr vir...

MANAS NATIONAL PARK Multiple-choice questions (MCQs) about Manas National Park —--- - —---------------------------------------------------- 1. ** Where is Manas National Park located?    - A) Rajasthan    - B) Assam    - C) Madhya Pradesh    - D) Kerala     - **Answer:** B) Assam 2. ** Which river flows through Manas National Park ?    - A) Ganga    - B) Yamuna    - C) Brahmaputra    - D) Manas    - ** Answer:** D) Manas 3. **In which year was Manas National Park declared a UNESCO World Heritage Site?    - A) 1985    - B) 1990    - C) 1995    - D) 2000    - ** Answer:** A) 1985 4. ** Which endangered species is Manas National Park famous for?    - A) Bengal Tiger    - B) Indian Rhino    - C) Golden Langur   ...

ENZYME EXPLANATION ENZYME   1. ** What are enzymes and their primary function? Answers :    Enzymes are specialized proteins that act as catalysts to accelerate biochemical reactions in living organisms. They facilitate these reactions without being consumed or permanently altered. 2. ** Describe the mechanism by which enzymes catalyze reactions .? Answers :    Enzymes catalyze reactions by reducing the activation energy required, thereby increasing the reaction rate. They achieve this by binding to specific substrates, forming an enzyme-substrate complex, which promotes the conversion of substrates into products. 3. ** What is the significance of the active site in an enzyme ? Answers :    The active site is a crucial region on an enzyme where substrates bind. It has a unique shape and chemical environment that is complementary to the substrate, ensuring high specificity and efficient catalysis. 4. ** Identify the key factor...

HUMAN BRAIN 🧠🧠🧠🧠🧠🧠 Human brain related questions:::: 1. ** Question:** What is the primary function of the cerebrum in the human brain?    **Answer:** The cerebrum is responsible for higher brain functions, including thought, action, and sensory processing. It is divided into four lobes: frontal, parietal, temporal, and occipital, each of which has specialized functions. 2. ** Question:** What is the mechanism of brain-to-body communication ?    **Answer:** The brain communicates with the rest of the body through the nervous system, using neurons to send and receive electrical signals. These signals are transmitted via the spinal cord and peripheral nerves to muscles and organs. 3 ** ** Question:** How does the amygdala function?   **Answer:** The amygdala is involved in processing emotions, such as fear, pleasure, and anger. It plays a key role in forming and storing emotional memories. 4. ** Question:** How does the prefrontal ...

EXCRETION (ADRE) EXCRETION   Excretion is the biological process by which an organism eliminates waste products and toxins from its body. This is essential for maintaining homeostasis and preventing damage to the organism. In humans and other animals, excretion primarily involves the removal of metabolic waste products such as carbon dioxide, urea, and salts. The main excretory organs include: 1. ** Kidneys **: Filter blood to produce urine, removing urea, excess salts, and water. 2. ** Lungs **: Expel carbon dioxide and water vapor produced during respiration. 3. ** Skin **: Excretes sweat, which contains water, salts, and some urea. 4. ** Liver **: Converts toxic substances into less harmful compounds, some of which are excreted in bile. Other organisms have different mechanisms and structures for excretion, but the fundamental purpose is the same: to maintain a stable internal environment by removing harmful byproducts of metabolism. Here excretion related some MCQ...

BIOLOGY PART 3 15 Biology multiple-choice questions (MCQs)along with their Answers  21. **Which disease is caused by the deficiency of vitamin C?**     - A) Scurvy     - B) Rickets     - C) Beriberi     - D) Pellagra     - **Answer: A) Scurvy** 22. **Which process allows plants to convert sunlight into energy?**     - A) Photosynthesis     - B) Respiration     - C) Fermentation     - D) Transpiration     - **Answer: A) Photosynthesis** 23. **Which blood vessel carries oxygenated blood from the lungs to the heart?**     - A) Vein     - B) Artery     - C) Capillary     - D) Pulmonary vein     - **Answer: D) Pulmonary vein** 24. **Which disease is caused by the Plasmodium parasite transmitt...