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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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Q:

Which of the following represents a positive economic statement?

A) The government should extend unemployment benefits. B) The unemployment rate is too high.
C) Taxes should not be increased since that will lower spending. D) The unemployment rate is 4.8 percent.
 
Answer & Explanation Answer: D) The unemployment rate is 4.8 percent.

Explanation:
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Q:

What element behaves most like magnesium?

A) Sr B) S
C) Si D) Sn
 
Answer & Explanation Answer: A) Sr

Explanation:

We know that, elements in the same group of the periodic table have similar characteristics. Here magnesium and strontium are the same 2nd group elements and have same behavior. 

Therefore, strontium behaves same as magnesium. 

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Q:

Which equation represents a neutralization reaction?

A) 2Al(OH)3(s) ---> Al2O3(s) + 3H2O(l) B) H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l)
C) 2H2(g) + O2(g) ---> 2H2O(l) D) H2CO3(aq) ---> CO2(g) + H2O(l)
 
Answer & Explanation Answer: B) H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l)

Explanation:

Here in the option B) H2SO4 - Sulfuric acid is reacting with sodium hydroxide (NaOH), a base to produce a salt (Sodium Sulfate), and water (H2O). This is characteristic of of acid-base neutralization reactions.

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Q:

Depletion of ozone layer is caused by

A) CFC's B) Carbon tetra-chloride (CCl4)
C) HCFC's D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Ozone layer depletion is one of the most serious problems faced by our planet earth. Substances that Deplete the Ozone Layer (ODS) emission are responsible for ultraviolet radiations from the sun break them to release chlorine (from CFCs) and bromine (from methyl bromide and halons).

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Q:

The reverse effect of X-ray emission is

A) Raman effect B) Compton effect
C) Zeeman effect D) Photo-electric effect
 
Answer & Explanation Answer: D) Photo-electric effect

Explanation:
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Q:

Which type of bond is found in sodium bromide?

A) Ionic B) Covalent
C) Polar covalent D) None of the above
 
Answer & Explanation Answer: A) Ionic

Explanation:
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Q:

Increasing the Alveolar ventilation rate will

A) Increase the rate of carbon dioxide diffusion from the blood to the alveoli B) Decrease the partial pressure of oxygen in the alveoli
C) Increase the partial pressure of carbon dioxide in the alveoli D) Have no effect on either partial pressure or diffusion rate of gases
 
Answer & Explanation Answer: A) Increase the rate of carbon dioxide diffusion from the blood to the alveoli

Explanation:

Increasing the Alveolar ventilation rate will increase the rate of carbon dioxide diffusion from the blood to the alveoli.

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