Free Human Body and Health MCQs with Answers

261. A blood alcohol level above ________ will often result in death:

• A. 0.10
• B. 0.20
• C. 0.30
• D. 0.41Chemistry

Explanation: A blood alcohol concentration around 0.40 or higher can suppress breathing and is frequently fatal, so 0.41 is the closest listed level. Individual tolerance and medical circumstances can change the outcome.

262. Chromosomes first become visible during which phases of mitosis:

• A. Prometaphase
• B. Telophase
• C. Prophase
• D. Metaphase

Explanation: Chromatin condenses into visibly distinct chromosomes during prophase, the first stage of mitosis. They become most clearly aligned and visible later at metaphase.

263. Study of culture is called?

• A. Odology
• B. Anthropology
• C. Ornithology
• D. Psychology

Explanation: Anthropology studies human beings, including their cultures, societies and development. Ornithology concerns birds, while psychology focuses mainly on behaviour and mental processes.

264. A disease always has a______?

• A. Cure
• B. Germs
• C. Cause
• D. Patient

Explanation: Every disease has a cause, such as an infection, genetic change, environmental exposure or abnormal body process. A disease does not always have a cure or identifiable germs.

265. An Average Hummingbird's heart rate per minute is __________.

• A. 500 times
• B. 1000 times
• C. more than 1000 times
• D. more than 1200 times

Explanation: A hummingbird's heart can beat at about 1,200 times per minute during intense activity, far faster than the human heart. Its rate varies with rest, flight and exertion.

266. Smallpox was eradicated in 1970s. What was the 'great pox' which remains active?

• A. Bubonic plague
• B. Syphilis
• C. Measles
• D. None

Explanation: Syphilis is historically called the great pox, while smallpox was called the small pox. Syphilis is caused by the bacterium Treponema pallidum.

267. Which one of the following is not a true snake________ ?

• A. Blink snake
• B. Glass snake
• C. Sea snake
• D. Tree snake

Explanation: A glass snake is actually a legless lizard, not a true snake; it may also have movable eyelids and external ear openings. The option appears to mean blind snake, which is a genuine snake group.

268. How many noses does an ant have?

• A. One
• B. Two
• C. Three
• D. None

Explanation: Ants have no nose like a vertebrate; they detect smells mainly through chemoreceptors on their antennae. Therefore the expected count of noses is none.

269. How many bones are present in face?

• A. 14
• B. 15
• C. 20
• D. 18

Explanation: The human face has 14 bones: six paired bones and two unpaired bones. The eight cranial bones are separate and are not included in this count.

270. Study of Liver and its diseases is called?

• A. Mycology
• B. Angiology
• C. Hepatology
• D. Otology

Explanation: Hepatology is the branch of medicine concerned with the liver, gallbladder, biliary tree and related diseases. Mycology concerns fungi, while otology concerns the ear.