Biology Questions

Q:

All of the following are true of neurons except that

A) they conduct a nervous impulse B) they are a very specialized form of connective tissue
C) thay are separated from one another by synapses D) When mature, they lose ability to divide
 
Answer & Explanation Answer: B) they are a very specialized form of connective tissue

Explanation:

All of the following are true of neurons except that they are a very specialized form of connective tissue.

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Q:

Membrane bound organelles are not found in the cells of

A) Eukaryotes B) Prokaryotes
C) Both A & B D) Nokaryotes
 
Answer & Explanation Answer: B) Prokaryotes

Explanation:

Membrane bound organelles are not found in the cells of Prokaryotes whereas Eukaryotes have nucleus and membrane bound organelles.

 

For example : Bacteria is prokaryotic organism with lack of nucleus and membrane bound organelles whereas fungi is a eukaryotic with nucleus and membrane bound organelles.

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Q:

The NADPH required for the calvin cycle comes from

A) Reactions initiated in photosystem 1 B) Citric acid cycle
C) Reactions initiated in photosystem 2 D) Glycolysis
 
Answer & Explanation Answer: C) Reactions initiated in photosystem 2

Explanation:

ATP and NADPH produced by the light reactions are used in the Calvin cycle to reduce carbon dioxide to sugar. The Calvin cycle is similar to the Krebs cycle in that the starting material is regenerated by the end of the cycle.

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Q:

The arbor vitae refers to

A) the pleatlike convolutions of the cerebellum B) cerebellar gray matter
C) flocculonodular nodes D) cerebellar white matter
 
Answer & Explanation Answer: D) cerebellar white matter

Explanation:

In the brain cerebellum, the arbor vitae refers to the cerebellar white matter which resembles the structure of arborvitae plant leaves and branches structure.

arbor-vitae1540288058.png image

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Q:

Localized area of pus formation in the lungs is

A) Pulmonary embolism B) Pulmonary abscess
C) Pleurisy D) Pulmonary edema
 
Answer & Explanation Answer: B) Pulmonary abscess

Explanation:

Pulmonary abscess is a type of liquefactive necrosis of the lung tissue. 

 

 localized_area_of_pus_formation_in_the_lungs1537941339.jpg image

 

Hence, Localized area of pus formation in the lungs is Pulmonary abscess.

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Q:

Goitre is due to the deficiency of

A) Calcium B) Zinc
C) Selenium D) Iodine
 
Answer & Explanation Answer: D) Iodine

Explanation:
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Q:

Antigens 'A' and 'B' are absent in persons belong to blood group

A) 'O' B) 'A'
C) 'B' D) 'AB'
 
Answer & Explanation Answer: A) 'O'

Explanation:
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Q:

Plantain is

A) a tree B) an annual herb
C) a perennial herb D) a shrub
 
Answer & Explanation Answer: C) a perennial herb

Explanation:

Plantain plant is a herb, because it does not have an aerial stem - what appears as a stem is really the leaves with sheathing bases. As the piant lives for several years it is called perennial herb

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