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DNA structure and scientists

Total questions: 24

Worksheet time: 39mins

Name
Class
Date
1.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
2.

Discovered that there was the same amount of A and T in a cell, and C and G in a cell, across many different species.

a)

James Watson & Francis Crick

b)

Rosalind Franklin

c)

Maurice Wilkins

d)

Linus Pauling

e)

Erwin Chargaff

3.

Provided clear x-ray crystallography images of DNA

a)

James Watson & Francis Crick

b)

Rosalind Franklin

c)

Maurice Wilkins

d)

Linus Pauling

e)

Erwin Chargaff

4.

Worked on DNA imaging techniques and published Franklin's x-ray crystallography image of DNA

a)

James Watson & Francis Crick

b)

Rosalind Franklin

c)

Maurice Wilkins

d)

Linus Pauling

e)

Erwin Chargaff

5.

Built models to determine that DNA was a double helix shape with base pairs A-T and G-C in rungs between the sugar/phosphate backbone of DNA.

a)

James Watson & Francis Crick

b)

Rosalind Franklin

c)

Maurice Wilkins

d)

Linus Pauling

e)

Erwin Chargaff

6.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
ribosome
d)
nucleus
7.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
8.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
9.
What are the three components of a nucleotide?
a)

sugar, hydrogen, nitrogenous base

b)

sugar, oxygen, nitrogenous base

c)

sugar, phosphate, nitrogenous base

d)
sugar, phosphate, protein
10.

What SHAPE is DNA?

a)

single strand

b)

straight ladder

c)

double helix (twisted ladder)

d)

DNA has no shape

11.

What makes up the SIDES (not the "middle") of a DNA ladder?

a)

nitrogen bases

b)

sugars & phosphates

c)

genes & chromosomes

d)

RNA

12.

What makes up the rungs (steps) of a DNA ladder?

a)

sugars & phosphates

b)

nitrogen bases

c)

sugars

d)

genes & chromosomes

13.

In DNA. what base always pairs with A (adenine)?

a)

A (adenine)

b)

T (thymine)

c)

C (cytosine)

d)

G (guanine)

14.

If one strand of a DNA molecule has the following order of bases, what will be the correct order of bases on the complementary (matching) strand?

AATTGGCC

a)

AATTGGCC

b)

TTAACCGG

c)

GGCCAATT

d)

GACTGACT

15.

Fill in the matching bases that would appear on the top strand of the DNA molecule pictured, in order.


A G T C A T G A

a)

A G T C A T G A

b)

T T T A A A C C

c)

T C A G T A C T

d)

C A T G A G A T

16.

What is a section of DNA that codes for a specific protein called?

a)

RNA

b)

replication

c)

gene

d)

protein

17.

CHALLENGE: Suppose a double-stranded DNA molecule was shown to have 15% ADENINE bases. What would be the expected percentage of GUANINE bases in that molecule?

a)

15%

b)

35%

c)

85%

d)

Not enough information to answer

18.

Which of these scientists that studied DNA's structure did NOT earn a Nobel Prize for their efforts?

a)

James Watson

b)

Francis Crick

c)

Maurice Wilkins

d)

Rosalind Franklin

19.
In the early 1900s, most scientists thought it was _____________ that carried traits form parent to offspring. 
a)
Carbohydrates
b)
Lipids
c)
Proteins
d)
DNA
20.
Griffith discovered that
a)
DNA is different than RNA.
b)
adenine = thymine.
c)
bacteria can transfer DNA.
d)
DNA is the genetic molecule.
21.
Which scientists used viruses and radioactive isotopes to definitively prove that DNA, and not protein, was the molecule of heredity?
a)
Griffith and Avery
b)
Chargaff and Franklin
c)
Watson and Crick
d)
Hershey and Chase
22.
The work of scientists including Griffin, Avery, Hershey & Chase, and Franklin helped us to determine that _______ are responsible for carrying genetic material.
a)
Amino Acids
b)
Proteins
c)
Nucleic Acids
d)
Carbohydrates
23.
By using radioactive isotopes, Hershey and Chase were able to conclude that _____ is the carrier of genetic information.
a)
DNA
b)
Protein
c)
Carbohydrate
d)
Lipid
24.
The work of Erwin Chargaff allowed Watson and Crick to determine the rules of.......
a)
protein synthesis
b)
transcription
c)
hydrogen bonding
d)
nitrogen base pairing

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