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Q:

Which of the following statements is most accurate regarding infection with parvovirus B19?

A) Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors B) Parvovirus B19 can cause hydrops fetalis via transplacental infection of a fetus in a seropositive mother
C) Parvovirus B19 can be diagnosed by detection of viral RNA using PCR or hybridization assays D) Parvovirus B19 replicates in the host cell nucleus utilizing a virally encoded DNA polymerase to create a double- stranded DNA intermediate
 
Answer & Explanation Answer: A) Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors

Explanation:

Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors.

 

a. Parvovirus B19 binds preferentially to the erythrocyte blood group P antigen on erythroid precursor cells.

Answers B, C, D are incorrect:

b. after entry the single-stranded viral DNA genome is transported to the cell nucleus where the host DNA polymerase synthesizes the complimentary DNA strand.

c. Parvovirus B19 infection can be diagnosed by direct detection of viral DNA not RNA.

d. the fetus of a seropositive mother is protected from infection by maternal circulating antibodies.

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Q:

The term facultative anaerobe refers to an organism that

A) Uses oxygen or grows without oxygen. B) Requires less oxygen than is present in air.
C) Prefers to grow without oxygen. D) Is killed by oxygen.
 
Answer & Explanation Answer: A) Uses oxygen or grows without oxygen.

Explanation:

The term facultative anaerobe refers to an organism that which uses oxygen when it is present or grows without oxygen when it is not there.

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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

It's nothing short of a revolution in how we eat, and it's getting closer every day. Yes, a lot of people are obese, and yes, the definition of "healthy eating" seems to change all the time. But in labs and research centres around the world, scientists are racing to match our genes and our taste buds, creating the perfect diet for each of us, a diet that will fight disease, increase longevity, boost physical and mental performance, and taste great to boot. As food scientist J.Bruce German says, "The foods we like the most will be the most healthy for us."

Is that going to be a great day, or what?

All this will come to pass, thanks to genomics, the science that maps and describes an individual's genetic code. In the future, personalized DNA chips will allow us to assess our own inherited predispositions for certain diseases, then adjust our diets accordingly. So, if you're at risk for heart disease, you won't just go on a generic low-fat diet. You'll eat foods with just the right amount and type of fat that's best for you. You'll even be able to track your metabolism day-to-day to determine what foods you should eat at any given time, for any given activity. "Since people differ in their genetics and metabolism, one diet won't fit all," says German. As complex as all this sounds, it could turn out to be relatively simple.

What is genomics?

A) The science which describes about maps B) The science which describes an individual
C) The science which deals with years D) The science that maps and describes an individual's genetic code
 
Answer & Explanation Answer: D) The science that maps and describes an individual's genetic code

Explanation:
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Q:

If the measure of the interior angle of a regular polygon is 1800, then how many sides does it have?

 

A)  6 B) 8
C) 9 D) 5
 
Answer & Explanation Answer: D) 5

Explanation:
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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

The salesman tried to(A)/sell me a solar water heater(B)/but I already have one.(C)/No error(D)

 

A) A B) B
C) C D) D
 
Answer & Explanation Answer: D) D

Explanation:
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Q:

Sourabh's mother is the daughter of Ajeet's only sister. Ritik is the grandson of Ajeet. How is Ritik related to Sourabh?

A) Cousin B) Brother
C) Uncle D) Maternal uncle
 
Answer & Explanation Answer: A) Cousin

Explanation:
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Q:

An implied power is one that

Answer

Implied powers are powers of U.S. government which have not been explicitly granted by the Constitution but that is implied by the necessary and proper clause to be delegated for the purpose of carrying out the enumerated powers.

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Q:

Which one of the following is not correct about Sargasso Sea?

A) It is characterized with anticyclonic circulation of ocean currents B) It records the highest salinity in Atlantic Ocean
C) It is located west ofGulf Stream and east of Canary Current D) It confined in gyre of calm and motionless water
 
Answer & Explanation Answer: A) It is characterized with anticyclonic circulation of ocean currents

Explanation:

The calm centre of the anticyclonic gyre in the North Atlantic, comprising a large eddy of surface water, the boundaries of which are demarcated by major current systems such as the Gulf Stream, Canaries Current, and North Atlantic Drift. The Sargasso Sea is a large, warm (18°C), saline, which is characterized by an abundance of floating brown seaweed (Sargassum).

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