Biology Questions

Q:

Select the correct statement about cellular respiration?

A) All the carbon atoms in glucose ultimately incorporated during cellular respiration into carbon dioxide molecule B) All the carbon atoms in glucose ultimately incorporated during cellular respiration into NADH molecule
C) All the carbon atoms in glucose ultimately incorporated during cellular respiration into ATP molecule D) All the carbon atoms in glucose ultimately incorporated during cellular respiration into water molecule
 
Answer & Explanation Answer: A) All the carbon atoms in glucose ultimately incorporated during cellular respiration into carbon dioxide molecule

Explanation:

All the carbon atoms in glucose ultimately incorporated during cellular respiration into carbon dioxide molecules.

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Q:

Organisms that depend only on raw plant products are said to be 

A) herbivorous B) vegetarian
C) carnivorous D) omnivorous
 
Answer & Explanation Answer: A) herbivorous

Explanation:

Herbivorous organisms are those that take for their food, plant parts like leaves raw in contrast to vegetarian, which means that plant products are taken raw or after being cooked.

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Q:

Cholesterol belongs to which class of molecules?

A) Lipids B) Carbohydrates
C) Nucleic acids D) Proteins
 
Answer & Explanation Answer: A) Lipids

Explanation:

Cholesterol belongs to lipids class of molecules. Lipids are sometimes called as fats which act as storing energy and structural components of cell membranes.

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Q:

Where does cellular respiration take place in the cell?

A) cytoplasm B) mitochodria
C) Ribosomes D) Chromosomes
 
Answer & Explanation Answer: B) mitochodria

Explanation:

Cellular repiration takes place in the mitochodria.

 

There are 3 phases of cellular respiration. They are:

1. Glycolysis (Fermentation),

2. Krebs Cycle, and

3. Electron Transport.

 

Glycolysis takes place in the cytoplasm. The Krebs cycle and electron transport takes place in the mitochondria.

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Q:

The support cells of the nervous system are

A) astrocytes B) oligodendrocytes
C) ependymal cells D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The support cells of the nervous system are Glia, also called glial cells or neuroglia. In the central nervous system, there are four types of supporting cells. They are ::

The_support_cells_of_the_nervous_system_are1547786671.jpg image

 

* Astrocytes

* Microglial cells

* Ependymal cells

* Oligodendrocytes

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Q:

What are the three parts of the Nucleotide?

Answer

Nucleotides are the building blocks of the DNA and RNA used as genetic material. Nucleotides also are used for cell signaling and to transport energy throughout cells.


Both deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are made up of nucleotides which consist of three parts::


1. Nitrogenous Base
2. Pentose Sugar
3. Phosphate Group.

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Q:

Genes are made of 

A) Carbohydrates B) Proteins
C) Fats D) Nucleotides
 
Answer & Explanation Answer: D) Nucleotides

Explanation:

Genes : The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These nucleotides occur in sequences and several nucleotides form one Gene ( a functional mgene is called a cistron)

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Q:

Which of the following is an Autoimmune disease?

A) Systematic lupus erythematosus B) Acute anaphylaxis
C) Farmer's lung D) A heart attack
 
Answer & Explanation Answer: A) Systematic lupus erythematosus

Explanation:

An autoimmune disease is a condition in which your immune system mistakenly attacks your body.

 

The immune system normally guards against germs like bacteria and viruses. When it senses these foreign invaders, it sends out an army of fighter cells to attack them. Normally, the immune system can tell the difference between foreign cells and your own cells.

 

In an autoimmune disease, the immune system mistakes part of your body — like your joints or skin — as foreign. It releases proteins called autoantibodies that attack healthy cells. Some autoimmune diseases target only one organ. Type 1 diabetes damages the pancreas. Other diseases, like lupus, affect the whole body.

 

Hence, Systematic lupus erythematosus is an autoimmune disease that affects multiple organs.

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