Hello. Can you please help me on this test? It is due in 1 hour. Thank you. (Just answer with the letter)

8 When a virus (of any kind) invades a cell, what goes inside and what stays outside of the
cell?
a the protein goes inside only
b the nucleic acid goes inside only
c the protein capsule and the nucleic acid goes inside together
d none of the above is correct

9 What do proteins have that DNA does not have?
a proteins have nitrogen and DNA does not
b proteins have phosphorus and DNA does not
c proteins have sulfur and DNA does not

10 What is a bacteriophage?
a a bacterium that destroys viruses
b a virus that invades and destroys bacteria
c a virus that invades other viruses
d a virus that invades plants

11 DNA is composed of nucleotides
a true
b false

12 Which of the following bases is found in DNA but not in RNA?
a adenine
b cytosine
c guanine
d thymine

13 Which of the following is not part of a nucleotide?
a phosphate
b purines
c pyrimidines
d ribose
e deoxyribose

14 Which of the following is a purine?
a guanine
b thymine
c cytosine

15 Which of the following scientists was a specialist in x-ray crystallography?
a Chargaff
b Watson
c Crick
d Franklin

16 Who determined that in DNA the amounts of Adenine were equal to those of Thymine
and that the amounts of Cytosine were equal to those of Guanine?
a Watson
b Crick
c Chargaff
d Franklin

17 What determines the with of the DNA molecule?
a the distance between purines and pyrimidines
b the distance between purines and purines
c the distance between pyrimidines and pyrimidines
d none of the above is correct

18 How many hydrogen bonds are between Thymine and Adenine?
a 1
b 2
c 3
d 4

19 How many hydrogen bonds are between Cytosine and Guanine?
a 1
b 2
c 3
d 4

20 Which is longer in time?
a G1
b S
c G2
d M

21 Proteins carry out the process of DNA replication
a true
b false
22 Which is true of DNA replication?
a it is conservative
b it is not conservative
c it is semiconservative

23 What does it mean that DNA is made up of one old and one new strand?
a it means that DNA makes a new copy from an old strand
b it means that DNA is made up of two strands, one old and one new
c it means that every individual has copies of DNA from their parents in the old
strand and copies of new DNA in their new strands
d all of the above are correct
e none of the above are correct

24 When DNA in eukaryotes is going to replicate it…
a it opens one bubble of replication
b it opens 2 bubbles of replication
c it opens many bubbles of replication

25 What does the Central Dogma Say?
a it says that DNA has a central strand
b it says that the flow of information is from proteins to RNA and from RNA
to DNA
c it says that the flow of information is from DNA to RNA and from RNA to Proteins

26 What is the meaning of the word Translation in DNA function?
a nothing, there is no relationship between DNA and Translation
b it means that RNA is “read” in order to interpret the type of proteins that is going
to be made
c it means that DNA makes RNA

27 Which nucleic acid has uracil?
a DNA and RNA
b DNA only
c RNA only

28. There are
a two types of DNA
b two types of RNA
c three types of RNA
d three types of DNA

29 What is the role of RNA polymerase?
a to copy the total length of one strand of DNA
b to make a copy pRNA
c to make a copy of mRNA

30 Which of the following is not true?
a replication copies all the DNA
b transcription uses DNA polymerase
c transcription uses RNA polymerase