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- Question
Which of the following statements is most accurate regarding infection with parvovirus B19?
Options- 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
- Correct Answer
- Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors
ExplanationParvovirus 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.
- 1. The term 'Caddle' is associates with which sports?
Options- A. Golf
- B. Billiards
- C. Polo
- D. Bridge Discuss
- 2. Rectifiers are used to convert
Options- A. Direct current to Alternating current
- B. Alternating current to Direct current
- C. high voltage to low voltage
- D. low voltage to high voltage Discuss
- 3. Main circuit board in a computer is...
Options- A. Decoder
- B. Highlight
- C. Select
- D. Mother board Discuss
- 4. In which decade was the first solid state integrated circuit demonstrated?
Options- A. 1950s
- B. 1960s
- C. 1970s
- D. 1980s Discuss
- 5. Which Indian batsman made three consecutive centuries in his first three Test matches?
Options- A. Vinoo Mankad
- B. Mohd. Azaruddin
- C. S.M. Gavaskar
- D. G.R. Viswanath Discuss
- 6. Changing computer language of 1's and 0's to characters that a person can understand is...
Options- A. Highlight
- B. Clip art
- C. Decode
- D. Execute Discuss
- 7. The variation in the duration of the day and the night is due to earth's
Options- A. rotation on its axis
- B. revolution around the sun
- C. inclination of an angle of 60(1/2) degrees
- D. both (a) and (b) Discuss
- 8. Velu Thampi led a revolt against the British in state of
Options- A. Travancore
- B. Baroda
- C. Hyderabad
- D. Mysore Discuss
- 9. Another name for a computer chip is ...
Options- A. Execute
- B. Micro chip
- C. Microprocessor
- D. Select Discuss
- 10. What is the length of each stump in the cricket?
Options- A. 35 inches
- B. 22 inches
- C. 28 inches
- D. 33 inches Discuss
More questions
Correct Answer: Golf
Correct Answer: Alternating current to Direct current
Correct Answer: Mother board
Correct Answer: 1950s
Explanation:
On September 12, 1958, Jack Kilby demonstrated the first working IC while working for Texas Instruments, although the U.S. patent office awarded the first patent for an integrated circuit to Robert Noyce of Fairchild.
Correct Answer: Mohd. Azaruddin
Correct Answer: Decode
Correct Answer: both (a) and (b)
Correct Answer: Travancore
Correct Answer: Micro chip
Correct Answer: 28 inches
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