Biology Questions

Q:

Contraction of heart is also known as

A) Systole B) Aristotle
C) Diastole D) Lub
 
Answer & Explanation Answer: A) Systole

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Q:

The motile germ cell is called a/an

A) Male gamete B) Gamete
C) Female gamete D) Isogamete
 
Answer & Explanation Answer: A) Male gamete

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Q:

Which factor affects the heart rate in mammals?

A) Need for oxygen B) RBC count in blood
C) Blood type D) All the above
 
Answer & Explanation Answer: A) Need for oxygen

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Q:

Which subatomic particle determines the identity of an element?

A) Electrons B) Protons
C) Neutrons D) All the above
 
Answer & Explanation Answer: B) Protons

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Q:

Which of the following has open vascular system?

A) Cockroach B) Human
C) Rat D) Birds
 
Answer & Explanation Answer: A) Cockroach

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Q:

In which form is glucose stored in our body?

A) Insulin B) Glucose
C) Glycogen D) Fat
 
Answer & Explanation Answer: C) Glycogen

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Q:

What does Trypsin do?

A) Breaks down Carbohydrates B) Synthesizes proteins
C) Breaks down fats D) Breaks down proteins
 
Answer & Explanation Answer: D) Breaks down proteins

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Q:

Which three processes are methods of genetic recombination?

A) independent assortment B) Crossing over
C) fertilization D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Genetic recombination is a complex process that involves alignment of two homologous DNA strands, precise breakage of each strand, equal exchange of DNA segments between the two strands, and sealing of the resultant recombined DNA molecules through the action of enzymes called ligases.

Crossing over, independent assortment and fertilization are methods of genetic recombination.

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