Discovering DNA as the Genetic Material Experiments

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Why did McLeod and McCarty destroy different macromolecules?

To observe the color changes in the macromolecules.

To identify the genetic material. (correct)

To understand the physical structure of macromolecules.

To see which macromolecule is the largest.

In Hershey-Chase experiment, why did they use sulfur on protein and phosphate on DNA?

To test bacterial resistance to various elements.

To determine the radioactivity levels of sulfur and phosphate.

To see how bacteria grow in different conditions.

To label the protein and DNA for tracking purposes. (correct)

What is the chemical basis for base pairing in DNA?

Thymine bonds with Adenine due to hydrogen bonding. (correct)

Cytosine pairs with Thymine to maintain DNA structure stability.

C binds with G because of their opposite charges.

G binds with A due to their similar sizes.

Why is it important for purines to pair with pyrimidines in DNA?

To prevent DNA from becoming too thick or too thin. Signup and view all the answers

What happens if purines bind with themselves according to Chargaff’s rule?

The DNA strand would be too thick. Signup and view all the answers

Which form of DNA is described as being narrow, right spun, and the most common in nature?

B-DNA Signup and view all the answers

What is the process where RNA copies DNA and converts it to mRNA?

Transcription Signup and view all the answers

During Griffith's Experiment, why did the mouse die when exposed to the bacteria?

The bacteria underwent transformation from r-strain to s-strain Signup and view all the answers

In McLeod and McCarty's Experiment, why did the mouse survive when exposed to the bacteria?

DNA was destroyed by DNase Signup and view all the answers

What is one of the main roles of a bacteriophage in the Hershey-Chase Experiment?

Injecting DNA or RNA into the bacterial cell Signup and view all the answers

What is the term for the process where bacteriophages cause the bacterial cell to burst and release more phages?

Lysis Signup and view all the answers

In the Hershey-Chase Experiment, what was found in the pellet fraction after centrifugation?

$32P$-labeled phages Signup and view all the answers

Which type of genetic material did the experiment involving tobacco mosaic virus demonstrate can be RNA?

DNA Signup and view all the answers

What component of the reconstituted viruses was originally from virus b in the experiment?

Protein Signup and view all the answers

Why is RNA more susceptible to degradation in cold temperatures compared to DNA?

RNA has one strand only Signup and view all the answers

According to Chargaff's rules, what is the relationship between A and T, and G and C in DNA?

(A+G) = (C+T) Signup and view all the answers

What does purines/pyrimidines ratio of 1.00 indicate regarding DNA composition?

Equal amounts of purines and pyrimidines Signup and view all the answers

What risk does pairing too many purines or pyrimidines pose to DNA structure according to the text?

Makes DNA wider than 2 nm Signup and view all the answers

Discovering DNA as the Genetic Material Experiments

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