Biology Questions

Q:

Oxygen crosses a plasma membrane by

A) Osmosis B) Evaporation
C) Concatenation D) Diffusion
 
Answer & Explanation Answer: A) Osmosis

Explanation:

Oxygen crosses a plasma membrane by Osmosis.

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Q:

Which of the following is a characteristic of the Ascomycota?

A) Sac formation B) Zygospore formation
C) Basidium formation D) All of the above
 
Answer & Explanation Answer: A) Sac formation

Explanation:

Ascomycota is a division or phylum of the kingdom Fungi that, together with the Basidiomycota, form the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. 

 

Hence, Sac formation is a characteristic of the Ascomycota fungi.

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Q:

What carries Blood away from the Heart?

A) Arteries B) Veins
C) Both A & B D) None
 
Answer & Explanation Answer: A) Arteries

Explanation:

We know that the circulatory system of our body is a loop. The Heart is the pump, the arteries and their smaller branches (arterioles) carry oxygen rich blood all through your body tissues from the heart and the veins and their smaller branches (venules) carry oxygen depleted blood and waste products back to the heart from all the body parts.

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Q:

Where does most digestion take place?

A) Stomach B) Large intestine
C) Small intestine D) Mouth
 
Answer & Explanation Answer: C) Small intestine

Explanation:

The digestion process starts in the mouth and the complete digestion process completes in the small intestine where all the nutrients in the food are absorbed.

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Q:

Which stage of cellular respiration produces the most ATP?

A) Glycolysis B) Kreb's cycle
C) Electron transport chain D) All the above
 
Answer & Explanation Answer: C) Electron transport chain

Explanation:

There are 3 stages in cellular respiration. They are:

1. Glycolysis

2. Kreb's cycle

3. Electron transport chain

 

Here, Glycolysis produces only 2 ATP whereas Kreb's cycle produces no ATP. Electron transport chain of the cellular respiration produces the maximum ATP.

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Q:

Which chemical is not found in DNA nucleotides?

A) Thymine B) Uracil
C) Adenine D) All of the above
 
Answer & Explanation Answer: B) Uracil

Explanation:

A nucleotide is an organic molecule that is the building block of DNA and RNA. They also have functions related to cell signaling, metabolism, and enzyme reactions. A nucleotide is made up of three parts: a phosphate group, a 5-carbon sugar, and a nitrogenous base. The four nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. RNA contains uracil, instead of thymine. 

 

A nucleotide within a chain makes up the genetic material of all known living things.

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Q:

Antipsychotic drugs have proved helpful in the treatment of

A) Epilepsy B) Schizophrenia
C) Psoriasis D) Eczema
 
Answer & Explanation Answer: B) Schizophrenia

Explanation:

Antipsychotic drugs have proved helpful in the treatment of schizophrenia and other psychotic disorders, inhibits dopamine, reduces delusions, hallucinations, thought disorganization.

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Q:

Where does meiosis take place in bryophytes?

A) Capsule B) Protonema
C) Antheridia D) None of the above
 
Answer & Explanation Answer: A) Capsule

Explanation:

Meiosis takes in the capsule of the Bryophytes.

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