73
Q:

From the following pairs, find the one which is correctly matched?

 

A) Scurvy- Thiamine B) Tuberculosis- ATS
C) Tetanus- BCG D) Malaria- Chloroquine

Answer:   D) Malaria- Chloroquine



Explanation:

Chloroquine is a medication used to prevent and to treat malaria.

Subject: Biology
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Q:

Select the correct statement about lymphocytes.

A) Lymph transport is faster than that occurring in veins B) Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles
C) Lymph transport is only necessary when illness causes tissue swelling D) Under normal conditions, lymph vessels are very high-pressure conduits
 
Answer & Explanation Answer: B) Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles

Explanation:

Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles is the correct statement regarding lymph transport.

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5 2318
Q:

What happens during the S-phase of the cell cycle?

A) cell division B) cell growth
C) DNA replication D) protein and enzyme synthesis
 
Answer & Explanation Answer: C) DNA replication

Explanation:

S-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Precise and accurate DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease.

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2 2780
Q:

Which organelle is the control center of a cell?

A) Nucleus B) Cytoplasm
C) Cell membrane D) endoplasmic reticulum
 
Answer & Explanation Answer: A) Nucleus

Explanation:

Nucleus serves as the control center for cell metabolism and reproduction.

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2 2483
Q:

What color is Lobster blood?

A) Blue B) White
C) Red D) Colourless
 
Answer & Explanation Answer: A) Blue

Explanation:

Lobsters, like snails and spiders, have blue blood due to the presence of hemocyanin, which contains copper. In contrast, vertebrates and many other animals have red blood from iron-rich hemoglobin.

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2 2638
Q:

Which observation proves that a cell is a eukaryote?

A) It contains DNA B) It contains ribosomes
C) It has a cell membrane D) It has DNA inside a nucleus
 
Answer & Explanation Answer: D) It has DNA inside a nucleus

Explanation:

Eukaryotic cells all have a nucleus. Eukaryotes are organisms that are multicellular, although there are some examples of single cellular eukaryotes. So eukaryotic cells can be either cell with a nucleus or a eukaryotic organism's cell.

The most important feature to judge whether it has nucleus membrane.

And for other choices, they are the common features of eukaryote and prokaryote.

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9 6052
Q:

Which of these is a human disease caused by bacteria?

A) TB B) Ascariasis
C) Chickenpox D) Common cold
 
Answer & Explanation Answer: A) TB

Explanation:

Bacteria which causes disease are called Pathogenic Bacteria. TB is caused by bacteria.

 

Some of the diseases caused by bacteria are::

1. Tuberculosis, TB (affects the lungs)

2. Salmonella (causes food poisoning)

3. Whooping cough (affects the lungs)

4. Septic Sore Throat

 

 

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2 1464
Q:

Which of the following is an Abiotic factor?

A) Plants B) Water
C) Consumers D) Animals
 
Answer & Explanation Answer: B) Water

Explanation:

Abiotic and biotic factors are what make up an ecosystem.

 

Abiotic factors are all nonliving components of an ecosystem. These factors include chemical and geological features such as water or lack of water, soil, rocks, and minerals. Other abiotic factors include physical components such as the temperature and weather affecting the ecosystem.


The biotic factors in an ecosystem include all living things. All plants, animals, fungi, protists, and bacteria within an ecosystem make up that system's biotic factors. The biotic factors can be broken down further into producers, consumers, and decomposers.

The biotic factors present in an ecosystem are highly dependent on the abiotic factors that are present. Even slight changes to either factor can have a major consequence upon the system as a whole.

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17 8656
Q:

How many pints of blood in the human body?

A) 6 - 8 B) 10 - 12
C) 8 - 10 D) 5 - 7
 
Answer & Explanation Answer: B) 10 - 12

Explanation:

Scientists estimate the volume of blood in a human body to be approximately 7 percent of body weight. An average adult body with a weight of 150 to 180 pounds will contain approximately 4.7 to 5.5 liters of blood. An average child with a body weight of 80 pounds will have approximately half the amount of blood as an adult.

The amount of blood in a human body varies, depending on factors such as age, sex, overall health and even where a person lives. For example, men tend to have more blood than women of comparable size and weight.

Interestingly, people who live at high altitudes may have up to two liters of extra blood compared to those who live at lower altitudes. Because the air at higher altitudes has less oxygen, people who live at high altitudes need extra blood to deliver the right amount of oxygen to their lungs.

 

We know that 1 Pint = 0.473 liters

 

Hence, an average amount of blood in the human body = 4.7 - 5.5 lit = 10 - 12 pints.

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