Question

i have multiple question I need help
Question 1

Which scientist determined that the fundamental unit of DNA was a nucleotide containing one of four possible bases, a sugar molecule, and a phosphate group?

Franklin

Watson and Crick

Levene

Chargaff

Answer 1

Question 2

Chargaff discovered that:

the tetranucleotide hypothesis was correct

for any organism, the amount of A was equal to the amount of T

DNA was a double helix

for any organism, the amount of T was equal to the amount of C and the amount of G was equal to the amount of A

3 points
Question 3

The purines are:

adenine and guanine

cytosine and guanine

cytosine and thymine

ribose and deoxyribose

3 points
Question 4

The pyrimidines are:

adenine and guanine

cytosine and guanine

cytosine and thymine

ribose and deoxyribose

3 points
Question 5

The Hershey-Chase experiment disproved which of these molecule groups as the physical carrier of inheritance?

proteins

nucleic acids

lipids

polysaccharides

3 points
Question 6

Which of the following is needed in the process of DNA replication?

enzymes

ATP energy

nucleotides

all of the above are needed in DNA replication

3 points
Question 7

Although her work was crucial for understanding the structure of the DNA molecule, Rosalind Franklin never received a Nobel Prize.

True

False

2 points
Question 8

Griffith's experiment involved bacteria that cause pneumonia.

True

False