Biology Questions

Q:

In plants, chloroplasts are necessary for 

A) photosynthesis B) storage
C) cell movement D) respiration
 
Answer & Explanation Answer: A) photosynthesis

Explanation:

Plants are producers, which means they make their own food. Chloroplasts are organelles found in eukaryotic and plant cells that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant.

Plants use energy from sunlight to help make their food, but they need chloroplasts to do it.

 

Hence, in plants, chloroplasts are necessary for Photosynthesis.

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Q:

An important function of fat in the body is to

A) Protect vital organs B) Stores energy
C) Insulate us D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:
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Q:

Factors that aid venous return include all except

A) pressure changes in the thorax B) urinary output
C) activity of skeletal muscles D) venous valves
 
Answer & Explanation Answer: B) urinary output

Explanation:
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Q:

Gluconeogenesis is a term that describes the synthesis of

Answer

Gluconeogenesis is a metabolic pathway that leads to the synthesis of glucose from pyruvate and other non-carbohydrate precursors, even in non-photosynthetic organisms.


 


It occurs in all microorganisms, fungi, plants and animals, and the reactions are essentially the same, leading to the synthesis of one glucose molecule from two pyruvate molecules. Therefore, it is in essence glycolysis in reverse, which instead goes from glucose to pyruvate, and shares seven enzymes with it.

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Q:

The blind spot of the eye is where the optic nerve leaves the eyeball.

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

Explanation:

Everyone of us have a blind spot which is a small portion within the visual field of every eye where the optic nerve and blood vessels leave the eyeball. Optic nerve is connected to brain ehich carries images of what we see.


the_blind_spot_of_the_eye_is_where1536397433.jpg image

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Q:

All enzymes are proteins.

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

Explanation:

All enzymes are proteins but all proteins are not enzymes since, enzymes are subset of proteins.

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Q:

Limbs of frog, lizard, bird and human are example of ______ organs.

A) Homogenous B) Heterogeneous
C) Analogous D) Homologous
 
Answer & Explanation Answer: D) Homologous

Explanation:
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Q:

Which of these statements is true of the kingdom protista?

A) All are unicellular B) All are hetertrophic
C) All are autotrophic D) All are eukaryotic
 
Answer & Explanation Answer: D) All are eukaryotic

Explanation:

Protists are eukaryotic organisms that cannot be classified as a plant, animal, or fungus. They are mostly unicellular, but some, like algae, are multicellular.

which_of_these_statements_is_true_of_the_kingdom_protista1536211148.jpg image

Kelp, or 'seaweed,' is a large multicellular protist that provides food, shelter, and oxygen for numerous underwater ecosystems.

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