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 Biology Questions

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Q:

Genes are situated on _________

A) Chromosome B) Mitochondria
C) Plastids D) Ribosomes
 
Answer & Explanation Answer: A) Chromosome

Explanation:
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7 3424
Q:

The disease Goitre is caused in persons who do not have in their diet sufficient

A) calcium B) sodium
C) iodine D) iron
 
Answer & Explanation Answer: C) iodine

Explanation:

Goitre is characterized by the swelling of the neck region. This is due to the enlargement of the thyroid gland which secretes hormone thyroxine. Thyroxine has iodine as an integral part of it. If there is not sufficient iodine in one's  diet, the thyroid gland swells up.

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5 3422
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 3421
Q:

Compared to land, the open oceans

A) are rich in silica and iron B) are nutrient-poor environments
C) contain unlimited nitrogen D) are nutrient-rich environments
 
Answer & Explanation Answer: B) are nutrient-poor environments

Explanation:
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Q:

Food wrapped in news paper is likely to get contaminated by 

A) Magnesium B) Alluminium
C) Lead D) Copper
 
Answer & Explanation Answer: C) Lead

Explanation:

It gets contaminated by lead

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10 3419
Q:

The storage form of glucose in animals is

A) Starch B) Glucose
C) Glycogen D) None of the above
 
Answer & Explanation Answer: C) Glycogen

Explanation:

Glycogen is the storage form of glucose in animals and humans which is analogous to the starch in plants. Glycogen is synthesized and stored mainly in the liver and the muscles.

 

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5 3415
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:

In which of the following organelles does photosynthesis take place?

A) Miochondria B) Chloroplast
C) Central Vacuole D) Ribosome
 
Answer & Explanation Answer: B) Chloroplast

Explanation:

Chloroplasts use energy from light to transform carbon dioxide and water into sugar and oxygen.

A green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.

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