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Home Q & A Board Biology-Related Homework Help Cell Biology
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addy121 addy121
wrote...
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Posts: 44
Rep: 6 0
13 years ago
Double-stranded DNA genomes are found in
1)    only in cells.
2)    only in viruses.
3)    only in viroids.
4)     in both cells and viruses.
5)     in both viruses and viroids
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addy121 Author
wrote...
#1
13 years ago
You have isolated a specimen of lambda phage in which the protein that suppresses prophage genes has suffered a significant mutation. Which of the following would you expect to observe in cultures of this virus?
 
The phage culture will replicate much more slowly than normal. 
The phage will never enter a lysogenic cycle. 
The phage particles will not attach properly to their host cells. 
The phage particles will not form a proper envelope. 
hllove,  LizZed,  middle2007,  ree1983,  torilockhart,  shooda
wrote...
#2
Staff Member
13 years ago
4)     in both cells and viruses.   Slight Smile
- Master of Science in Biology
- Bachelor of Science
addy121 Author
wrote...
#3
13 years ago
In a plaque assay, a microbiologist counts 20 plaques on a plate. How many phage particles can be assumed to have been present in the original bacterium-virus mixture on the plate, if there was no dilution of the mixture prior to plating?

40
10
2
20
gold2713,  beccag
wrote...
#4
Staff Member
13 years ago
Quote from: addy121 (13 years ago)
You have isolated a specimen of lambda phage in which the protein that suppresses prophage genes has suffered a significant mutation. Which of the following would you expect to observe in cultures of this virus?
 
The phage culture will replicate much more slowly than normal.  
The phage will never enter a lysogenic cycle.  
The phage particles will not attach properly to their host cells.  
The phage particles will not form a proper envelope.  


Prophage is the latent form of a bacteriophage in which the viral genes are incorporated into the bacterial chromosomes without causing disruption.

Answer is (I think): The phage will never enter a lysogenic cycle.  ...
brigette04,  bio_man
- Master of Science in Biology
- Bachelor of Science
Answer accepted by topic starter
duddyduddy
wrote...
#5
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13 years ago
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This verified answer contains over 140 words.
gold2713
- Master of Science in Biology
- Bachelor of Science

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addy121 Author
wrote...
#6
13 years ago
ur awesomeeeeeeeEeeeeeeee Smiling Face with Open Mouth:D thank u soo much for ur help (+2)Slight Smile
lanegabby
wrote...
#7
Staff Member
13 years ago
Quote from: addy121 (13 years ago)
ur awesomeeeeeeeEeeeeeeee Smiling Face with Open Mouth:D thank u soo much for ur help (+2)Slight Smile

Make sure they're correct Slight Smile
- Master of Science in Biology
- Bachelor of Science
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