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adoni [48]
3 years ago
9

The Hershey and Chase experiments involved the preparation of two different types of radioactively labeled phage. Which of the f

ollowing best explains why two preparations were required?A. The bacteriophage used in the experiments was a T2 phage.B. It was necessary that each of the two phage components, DNA and protein, be identifiable upon recovery at the end of the experiment.C. Each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope.D. Establishing the identity of the genetic material required observation of two phage generations.
Biology
1 answer:
Tems11 [23]3 years ago
6 0

Answer:

The correct answer is B.It was necessary that each of the two phage components, DNA and protein, be identifiable upon recovery at the end of the experiment

Explanation:

Hershey and chase in his experiment lebelled the T₂ bacteriophage with radioactive sulfur and radioactive phosphorus separately. Then they infect E.coli with T₂phage and separated phage from bacteria by centrifugation.

Because DNA contains phosphorus not protein, cells infected with phage containing radioactive phosphorous showed radioactivity bacause DNA enters the cell not protein confirming DNA is the genetic material and radioactive sulfur was found in supernatant.

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Excess post-exercise oxygen consumption is the extra amount of oxygen consumed after the completion of exercise and before respi
Scilla [17]

The extra oxygen is used to restore muscle fibers to their pre-exercise state by doing all of the following except facilitating calcium release from the sarcoplasmic reticulum in the muscle fiber. Thus, the correct option is B.

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The extra oxygen works in the muscle fiber by replenishing the ATP, restocking the myoglobin, and supplying the ATP used to replenish glycogen stores in the muscle fiber.

Therefore, the correct option for this question is B.

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5 0
2 years ago
Please explain the words above with your own words
aksik [14]

Ribosomes - An organelle that creates proteins.

Golgi Apparatus - Moves lipids around the cells, also modify's, sorts, and packages proteins.

Hope this helps!

6 0
3 years ago
The classification of organisms is called (1 point)​
Inga [223]

Answer:

taxonomy

started by linnaeus

Explanation:

7 0
3 years ago
Muscles that bend at a joint are called:
evablogger [386]
Elbows and knees would be the answer
8 0
3 years ago
Read 2 more answers
Which is an example of an insertion mutation that changes all of the amino acids that follow the mutation?
astra-53 [7]

Answer:


2) CAG - TTC - ACG mutates to CAG - TTC - ACC - ACG

Explanation:

Insertions are mutations in which extra base pairs are inserted into a new place in the DNA. The number of base pairs inserted can range from one to thousands!

In option no. 1: We see that there is not addition of a single or more than one base, but the new base sequence is different from the original sequence at three places i.e: TTA - CAC - G

In option no. 2: The insertion of three bases ACC has been made exactly after TTC, the whole sequence and arrangement of bases remain same except this insertion.


In option no. 3: The first base of the sequence T is replaced with A, and all other sequence is same. This type of mutation is called substitution in which one base is replaced by other.


In option no. 4: The last base of the sequence C is deleted, and is not present in new sequence. This type of mutation is called deletion in which a base is removed from the sequence.


Conclusion: Therefore, the best option is 2, in which whole codon is inserted in the DNA base sequence.



7 0
3 years ago
Read 2 more answers
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