Biology Questions

Q:

Which of the following does not occur during Mitosis?

A) spindle formation B) condensation of the chromosomes
C) breakdown of the nuclear membrane D) replication of the DNA
 
Answer & Explanation Answer: D) replication of the DNA

Explanation:

Replication of the DNA does not occur during Mitosis.

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Q:

Why is RNA necessary to act as a messenger?

Answer

Why_is_RNA_necessary_to_act_as_a_messenger1548936409.jpg image


RNA acts as a messenger in between the DNA and ribosome as it transforms the genetic information from the DNA and as DNA is big and can't fit into the nuclear pores. 

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Q:

Which statement describes decomposers?

A) Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems. B) Decomposers can produce their own source of energy and can sometimes act as primary producers.
C) Decomposers are those organisms that recycle matter in the ecosystem.. D) All the above
 
Answer & Explanation Answer: C) Decomposers are those organisms that recycle matter in the ecosystem..

Explanation:

Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition.

 

The statement "Decomposers are those organisms that recycle matter in the ecosystem" describes decomposers.

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Q:

The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. The first stage is the ___________ stage.

A) Agar B) Leafy
C) Chlorella D) protonema
 
Answer & Explanation Answer: D) protonema

Explanation:
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Q:

The right ventricle transports oxygenated blood to the lungs.

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

Explanation:

The right ventricle transports deoxygenated blood to the lungs, where the oxygenation takes place.


Hence, the given statement is FALSE.

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Q:

Appetite is triggered by

A) stomach enzymes B) pancreatic enzymes
C) physiological drive D) environmental cues such as the smell or taste of food
 
Answer & Explanation Answer: D) environmental cues such as the smell or taste of food

Explanation:

Appetite is the desire to eat food, sometimes due to hunger. Appetite is triggered by environmental cues such as the smell or taste of food. Appealing foods can stimulate appetite even when hunger is absent.

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Q:

Which one of the following is true of tRNAs?

A) tRNAs are double-stranded. B) There are four types of tRNA.
C) Each tRNA binds a particular amino acid. D) All of the above
 
Answer & Explanation Answer: C) Each tRNA binds a particular amino acid.

Explanation:

tRNA abbreviated as A transfer RNA is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.

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Q:

Phage typing is based on the fact that

A) viruses cause disease B) bacteria and viruses are related
C) bacteria are destroyed by viruses D) bacterial viruses attack specific cells
 
Answer & Explanation Answer: D) bacterial viruses attack specific cells

Explanation:

Phage typing is based on the fact that bacterial viruses attack specific cells. Phage typing is a method used for detecting single strains of bacteria. It is used to trace the source of outbreaks of infections. 

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