Biology Questions

Q:

Prokaryotic cells lack

A) Membrane bound by organelles B) Nucleolus
C) Nuclear membrane D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Prokaryotic cells lack a nucleus and do not have an extensive system of interior membranes. They are encased in a cell wall and many contain external structures such as a capsule, flagellum, or pili. Prokaryotes – have a relatively uniform interior that is not subdivided by internal membranes.

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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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Q:

Human Heart is made up of

A) nervous tissue B) cardiac muscle
C) nonstriated muscle D) connective tissue
 
Answer & Explanation Answer: B) cardiac muscle

Explanation:
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Q:

Pressure, pain, and temperature receptors in the skin are

A) Exteroceptors B) Proprioceptors
C) Interoceptors D) Mechanoreceptors
 
Answer & Explanation Answer: A) Exteroceptors

Explanation:
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Q:

Where is glucose stored in the body?

A) bones B) blood
C) organs D) None of the above
 
Answer & Explanation Answer: B) blood

Explanation:

In human body, glucose is stored in blood stream before it is converted to glycogen. Excess glucose is stored in the form of fats. After conversion, glycogen is stored in Muscles and Liver.

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Q:

Basophils increase in number when parasitic invasion occurs.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

FALSE. Basophils number will not be increased when parasitic invasion occurs.


 


Basophils are a type of white blood cell. Although they're produced in the bone marrow, they're found in many tissues throughout your body. They're part of your immune system and play a role in its proper function.


 


Basophils appear in many specific kinds of inflammatory reactions, particularly those that cause allergic symptoms. If your basophil level is low, it may be due to a severe allergic reaction.


 


Basophils contain anticoagulant heparin, which prevents blood from clotting too quickly. They also contain the vasodilator histamine, which promotes blood flow to tissues.


 

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Q:

Which organelles in the cell, other than nucleus contains DNA?

A) Centriole B) Goalgi apparatus
C) Lysosomes D) Mitochondria
 
Answer & Explanation Answer: D) Mitochondria

Explanation:
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Q:

A gland below the bladder and surrounding the urethra is

A) prostate B) seminal vesicle
C) bartholin D) vas deferens
 
Answer & Explanation Answer: A) prostate

Explanation:

                               prostategland1531291431.jpg image

A gland surrounding the neck of the bladder in male mammals and releasing a fluid component of semen is Prostate gland which is below the bladder and surrounding the urethra.

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