Biology Questions

Q:

The grouping of blood is based on substances called

A) antibodies B) antigens
C) antitoxin D) enzymes
 
Answer & Explanation Answer: B) antigens

Explanation:

The red blood corpuscles or Erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen A in their red corpuscles.The AB group persons have both antigen A and antigen B in their erythrocytes.The 'O'group persons have no antigens in their red corpuscles.

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Q:

Islets of Langerhans are present in

A) Kidney B) Liver
C) Pancreas D) Trachea
 
Answer & Explanation Answer: C) Pancreas

Explanation:
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Q:

A true species in mauritius failed to reproduce because of the extinction of a fruit eating bird. Which one of the following was that bird?

A) Dove B) Dodo
C) Condor D) Skua
 
Answer & Explanation Answer: B) Dodo

Explanation:
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Q:

The mode of nutrition in which particulate food is devoured is 

A) holozoic B) holophytic
C) saprophytic D) parasitic
 
Answer & Explanation Answer: A) holozoic

Explanation:

The feeding mechanism is of several types.If it is entirely plant-like (photosynthesis), it is called holophytic. It is entirely (holo) animal-like(zoic),that is devouring alreadyexisting food, it is called holozoic

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Q:

Which organ filters blood in human body?

A) Lungs B) Heart
C) Liver D) Kidneys
 
Answer & Explanation Answer: D) Kidneys

Explanation:

The organ which filters blood in human body are kidneys.

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Q:

What is a direct result of aerobic respiration?

A) The enzymes for anaerobic respiration are produced and stored in lysosomes B) Alcohol is produced by yeast and bacteria
C) The potential energy of glucose is transferred to ATP molecules D) Lactic acid is produced in muscle tissue
 
Answer & Explanation Answer: C) The potential energy of glucose is transferred to ATP molecules

Explanation:

Aerobic respiration is the reaction takes place in presence of oxygen which quite opposite to anerobic. The direct result of aerobic repiration is ATP molecules from breakdown of glucose molecules.

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Q:

Where does translation take place in the cell?

A) Nucleus B) Mitochondria
C) Ribosomes D) Cytoplasm
 
Answer & Explanation Answer: D) Cytoplasm

Explanation:

Translation occurs in the cytoplasm whereas transcription occurs in the nucleus.

 

Transcription and Translation:

Terms transcription and translation in biology are generally related to the DNA and its properties. Human cells replicate. In order to do that, they have to produce the same constituents for the new cell that is to be made. The only way to do that is by producing proteins.

 

The proteins are produced in the process that is called protein synthesis. The first step is in the nucleus where a particular gene is being expressed so it enables all protein factors to come and to replicate that part of a chromosome. This is finished when mRNA, the same single-stranded genetic code of a particular gene, is formed. This is transcription.

Right after that, the mRNA enters the cytoplasm through nuclear pores. There, it could be translated into proteins by ribosomes. This process is called translation.

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Q:

Which one of the following strongly threatens biodiversity?

A) Eragile ecosystems such as mangroves and wetlands B) Inaccessible habitates in the Himalayas
C) Desstruction of natural habitates and regetation and Jhum cultivation D) Creation of biosphere reserves
 
Answer & Explanation Answer: C) Desstruction of natural habitates and regetation and Jhum cultivation

Explanation:
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