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Q:

What produces the striations of a skeletal muscle cell?

Answer

The striations are a result of the A bands of sarcomeres appearing as relatively wide, dark stripes under the microscope, which alternate with narrower, lighter colored stripes formed by the I bands. 


The striations of skeletal muscle are created by the organization of actin and myosin filaments resulting in the banding pattern of myofibrils.

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Q:

Which of the following disease is caused by female Anopheles mosquito?

A) Chicken Pox B) Malaria
C) Black Fever D) Cholera
 
Answer & Explanation Answer: C) Black Fever

Explanation:
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Q:

Taenia (Tapeworm), Fasciola (Liver fluke) are examples of which Phylum?

A) Coelenterata B) Platyhelminthes
C) Annelida D) Arthropoda
 
Answer & Explanation Answer: B) Platyhelminthes

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Q:

The saliva in human beings contains which enzyme?

A) Pepsin B) Salivary Amylase  
C) Rennin D) Trypsin
 
Answer & Explanation Answer: B) Salivary Amylase  

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Q:

Through photosynthesis at least a half of the total carbon dioxide fixation on earth is carried out by?

A) Pteridophytes B) Bryophytes
C) Algae D) Gymnosperms
 
Answer & Explanation Answer: C) Algae

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Q:

Which of the following is not true about Angiosperms?

A) Dominant phase is gametophytes B) Vascular bundles are present
C) Spores are heterospores D) Seeds are covered
 
Answer & Explanation Answer: A) Dominant phase is gametophytes

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Q:

Which of the following is not true of graded potentials?

A) They can form on receptor endings B) They increase amplitude as they move away from the stimulus point
C) They are short-lived D) They can be called postsynaptic potentials
 
Answer & Explanation Answer: B) They increase amplitude as they move away from the stimulus point

Explanation:

Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none.

 

In the given options, They increase amplitude as they move away from the stimulus point is not true about the graded potentials.

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Q:

The body cavity which is lined by mesoderm is called __________.

A) Coelom B) Chordata
C) Arthropoda D) Platyhelminthes
 
Answer & Explanation Answer: A) Coelom

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