Tasherrysarish
Answered

  1. Which of the following discoveries provided a critical clue to Watson and Crick in solving the structure of DNA? (1 point)

the Hershey-Chase experiment

Griffith’s transformation experiment

Chargaff’s base ratios

Miescher’s isolation of DNA

  1. A DNA strand with the sequence A-T-T-G-C-T would be complementary to which of the following? (1 point)

T-A-T-G-G-A

T-A-A-C-G-A

C-A-A-T-A-G

G-C-C-A-T-C

  1. DNA from one species differs from the DNA of another species in its _____. (1 point)

base ratios

sugars

phosphate groups

all of the above

Verified Answer :

1.
double helix model was proposed after getting the clue from chargaff rule
purines = pyramidines

2.
A = T ( this means A pairs with T)
G = C (this means G pairs with C)

A DNA strand with the sequence A-T-T-G-C-T is T-A-A-C-G-A

3.

In all the species the nucleic acid is made of phosphate , sugar , nitrogenous base (A,T,C,G)
only the number purines and pyrimidines vary.

Related Questions