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 Biology Questions

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Q:

The fluid mosaic model describes the structure of

A) cell B) plasma membrane
C) nucleus D) All of the above
 
Answer & Explanation Answer: B) plasma membrane

Explanation:
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2 1871
Q:

Deficiency of which minerals causes goiter?

A) Magnesium B) Calcium
C) Iodine D) Sulphur
 
Answer & Explanation Answer: C) Iodine

Explanation:

Deficiency of Iodine cause Goiter also called Enlarged Thyroid. It doesn't give any pain but difficult to swallow and breath are its causes.

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13 1870
Q:

Systems biology is mainly an attempt to

A) Understand the behavior of entire biological systems B) Speed up the technological application of scientific knowledge
C) Analyze genomes from different species. D) None of the above
 
Answer & Explanation Answer: A) Understand the behavior of entire biological systems

Explanation:

An approach to studying biology that aims to model the dynamic behavior of whole biological systems based on a study of the interactions among the system's parts.

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1 1869
Q:

Which membrane is highly convoluted?

A) the chloroplast outer membrane B) chloroplast inner membrane
C) both the mitochondrial and chloroplast outer membranes D) mitochondrial inner membrane
 
Answer & Explanation Answer: D) mitochondrial inner membrane

Explanation:
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3 1862
Q:

Atrophy is a condition that occurs when

A) muscle decreases in size and function because of disease or trauma B) carbon dioxide, lactic acid, and other wastes accumulate in the muscle
C) increased use of skeletal muscle causes an increase in its strength D) the tendons that attach muscle to bone become stretched or injured
 
Answer & Explanation Answer: A) muscle decreases in size and function because of disease or trauma

Explanation:
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1 1862
Q:

Bacteria divide by

A) Binary Fission B) Spirilla
C) RNA D) Fusion
 
Answer & Explanation Answer: A) Binary Fission

Explanation:

Bacteria divided and reproduce by Binary fission. In this process, the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two replicates.

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3 1860
Q:

Which best describes Genes?

A) long, double chains of nucleic acids. B) long, single chains of amino acids.
C) long, single chains of nucleic acids. D) long, double chains of amino acids.
 
Answer & Explanation Answer: A) long, double chains of nucleic acids.

Explanation:

Gene is a segment of chromosomal DNA or a sequence of DNA or RNA that codes for a molecule that has a function. It is the basic physical and functional unit of heredity.

 

As genes are made up of DNA it impies that they are long, double chains of nucleic acids as DNA is made of nucleic acids.

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1 1860
Q:

Where does protein synthesis take place?

A) Nucleus B) Ribosomes
C) On the cell wall D) All of the above
 
Answer & Explanation Answer: B) Ribosomes

Explanation:

Protein synthesis take place in the cytoplasm where ribosomes are located as they are the machinery which are responsible for the protein synthesis.

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3 1858