Biology MCQs

Biology is the scientific study of living organisms and their essential processes. The field is concerned with all of life’s physicochemical features. The present trend toward cross-disciplinary research and the unification of scientific information and investigation from other fields has resulted in a lot of overlap between biology and other scientific disciplines. 

In domains like biochemistry, biomedicine, and biophysics, modern principles from other fields—for example, chemistry, medicine, and physics—are combined with those of biology.

Q.1. When was the Project Tiger launched?

1. 2004-2005

2. 1973-1974

3. 1983-1984

4. 2013-2014

Answer: Generally in 1973, the tiger project was launched to save or protect the diminishing tiger population. It was launched in order to ensure the conservation of the national animal of the country, tiger. Hence 1973-1974 is the correct answer.

Q.2. Under UNESCO World Heritage Site’s list which among the following places come?

1. Nanda Devi and Valley of Flowers National Parks

2. Jim Corbett National Park

3. Rajaji National Park

4. None of the above

Answer: India’s Valley of Flowers National Park is known for its meadows of endemic alphine flowers and outstanding natural Beauty and this is located in the Chamoli District of Uttarakhand. Hence the correct option is Nanda Devi and Valley of Flowers National Parks.

Q.3. Among these which species are NOT in the IUCN classification of threatened species?

1. Extinct

2. Harmful

3. Vulnerable

4. Endangered

Answer: Harmful Species are not in the IUCN classification of threatened species. Generally IUCN red list was founded in 1964. Hence Harmful is the correct option.

Q.4. Carbon makes up what percentage of the dry weight of living organisms?

1. 49 Percent

2. 55 Percent

3. 20 Percent

4. 90 Percent

Answer: The correct option is 49 Percent. Carbon makes up around 49% of the dry weight of all living things. It is, after water, the second most plentiful thing in nature. It is the universe’s fourth most abundant element.

Q.5. Mention the most abundant constituent found in living organisms?

1. Hydrogen Bicarbonate

2. Ammonia

3. Oxygen

4. Water

Answer: Water is the correct answer. Water is the most abundant chemical in living creatures. It is the most vital chemical for living organisms’ survival. Water makes up 60% of the human body.

Q.6. What percent of Carbon is found dissolved in oceans out of the total quantity of global Carbon?

1. 50 Percent

2. 71 Percent

3. 90 Percent

4. 25 Percent

Answer: The correct option is 71 percent. Out of the entire amount of carbon in the world, over 71 percent is found dissolved in the oceans. Almost all of the remaining 71 percent is found in oceans. Carbon in the oceans ranges from 38,000 to 40,000 gigatons (Gt).

Q.7. Name the reservoir that regulates the amount of Carbon Dioxide In the atmosphere?

1. Sedimentary Reservoir

2. Atmospheric Reservoir

3. Oceanic Reservoir

4. Gaseous Reservoir

Answer: Oceanic Reservoir is the correct option. Out of the entire amount of carbon in the world, over 71 percent is found dissolved in the oceans. Almost all of the remaining 71 percent is found in oceans. This oceanic reserve controls the amount of carbon dioxide in the atmosphere.

Q.8. How many percent of total global carbon does the atmosphere contain?

1. 50 Percent

2. 1 Percent

3. 5 Percent

4. 20 Percent

Answer: 1 Percent is the correct option. Carbon makes up over 49% of the total dry weight of all living things. Only 1% of the total carbon in the world is in the atmosphere. It is the universe’s fourth most abundant element.

Q.9. Mention whose reservoir does fossil fuel represent?

1. Carbon

2. Oxygen

3. Helium

4. Argon

Q.10. Mention the full form of ECG?

1. Electro cardio Group

2. Electrocardiogram

3. Electrocardium Granules

4. Electricity Cardiac Group

Answer: The correct answer is Electrocardium. Electrocardiogram is the term for electrocardiogram. The Electrocardiogram (ECG) is a graphical representation of the heart’s electrical activity during a cardiac cycle. A gadget called an electrocardiogram is used to measure it.

Q.11. How many electrodes are connected to a patient to measure ECG?

1. Two

2. One

3. Four

4. Three

Answer: The correct answer is Three. A patient is attached to the equipment with three electrical leads: one to each wrist and one to the left ankle to perform a normal ECG. It keeps track of your heartbeat in real time.

Q.12. Mention the full form of CAD?

1. Carotid Artery Disorder

2. Carotid Artery Disease

3. Coronary Artery Disease

4. Coronary Angina Disorder

Answer: The correct answer is Coronary Artery Disease. Coronary artery disease (CAD) is a condition caused by atherosclerosis and arteriosclerosis. Atherosclerosis is the build-up of cholesterol, fat, and calcium on the walls of coronary arteries, whereas arteriosclerosis is the build-up of calcium that causes artery hardening.

Q.13. Among these which waves represent the excitation of the atria?

1. T-Wave

2. P-Wave

3. QRS Complex

4. ST-Segment

Answer: The correct answer is P-Wave. The P-wave represents the electrical excitement of atria depolarisation, which causes both atria to constrict. The repolarization of the ventricles is represented by the T-wave.

Q.14. Which of the following shows the depolarisation of the Ventricles?

1. T-Wave

2. P-Wave

3. QRS Wave

4. PQ Interval

Answer: QRS Wave is the correct answer. The depolarization of the ventricles, which initiates ventricular contraction, is represented by the QRS complex. Shortly after Q, the contraction begins, signalling the start of the systole.

Q.15. Generally, the end of the T Wave marks the end of the systole?

1. False 

2. True

Answer: It is true. The systole comes to a end at the end of the T-wave. The T-wave denotes the return of the ventricles from an excited to a normal condition, also known as ventricle repolarisation.

Q.16. The Heartbeat of a person can be measured by counting the number of which wave?

1. QRS Complex

2. T-Wave

3. P-Wave

4. PQ-Wave

Answer: The correct answer is QRS Complex. The heartbeat rate of an individual can be determined by counting the number of QRS complexes that occur in a certain interval. Any deviation from the curve’s forms could suggest an anomaly or sickness. As a result, it is extremely important in clinical practise.

Q.17. Define Hemophilia?

1. A type of Cancer

2. A digestive disorder

3. A skin condition

4. A blood clotting disorder

Answer: The correct answer is a blood clotting Disorder. Hemophilia is a clotting condition in which the blood does not clot properly. For blood to clot properly, a protein called clotting factor is required, and persons with haemophilia have little or no clotting factor.

Q.18. What causes Hemophilia?

1. Genetic Mutation

2. Bacteria

3. Viruses

4. The cause is unknown

Answer: The correct option is Genetic Mutation. Hemophilia is caused by a genetic mutation. The way the body creates blood clotting factors is determined by genes. Hemophilia is caused by a mutation in the gene that makes blood clotting factors.

Q.19. Whether the statement is true or false

Only men can get haemophilia

1. False

2. True

Answer: The correct answer is False. The majority of haemophilia sufferers are men, but females can also be affected.

The gene that produces clotting factors is found on the X chromosome. Males have one X and one Y chromosome, while females have two X chromosomes (XX) (XY). Because males only have one X chromosome, they only have one copy of most X chromosome genes, resulting in haemophilia if the X chromosome gene is faulty. Hemophilia affects both X chromosomes in females, or one chromosome is afflicted while the other is inactive or missing.

Q.20. Mention the types of Hemophilia?

1. Hemophilia B

2. Hemophilia A

3. Acquired or Sporadic

4. All of the above

Answer: The correct answer is all of the above. Hemophilia is divided into three categories.