Biology Forums - Study Force

Which is the DNA nucleotide sequence that is complementary to the strand of DNA below?
..TTAAGCTAGC...

Question options:

1)

...AATTCGATCG...

2)

...CGATCGAATT...

3)

...TTAAGCTAGC...

4)

...UUAACGUACG...


The molecule depicted in this diagram is:
Molecule  (see image below)

Question  options:

1)

sugar.

2)

pyrimidine.

3)

purine.

4)

nucleotide.


Recombinant DNA experiments often involve all of the following except
Question options:

1)

E. coli bacteria.

2)

ligase enzymes.

3)

restriction enzymes.

4)

genome insertion.


All of the following are characteristics of semiconservative DNA replication except:
Question 7 options:

1)

each newly formed strand contains an "old" parent strand and one new strand.

2)

each parent strand acts as a template for the synthesis of a new strand of DNA.

3)

each parent strand is conserved.

4)

each parent strand remains intact as a new double strand is formed.

The pheontype of an organism is determined primarily by which of the following parts of the DNA molecule?
Question  options:

1)

base parts.

2)

deoxyribose groups.

3)

phosphate groups.

4)

the degree of folding in the helix.


If the DNA code for the amino acid threonine is T-G-A, then the mRNA code is
Question  options:

1)

U-C-C

2)

A-C-T

3)

U-C-U

4)

A-C-U


If the DNA code for isoleucine is T-A-G, then the anticodon is
Question options:

1)

A-U-C

2)

U-A-G

3)

A-U-G

4)

U-A-T


Initiators and terminators (start and stop codons) are important to protein synthesis because they specify
Question  options:

1)

where the mRNA chain should start to be read and where reading should end.

2)

where the amino acids should be added to the ribosome.

3)

how many amino acids should be included in the protein.

4)

when the DNA replication begins and ends.


Mutations may be transmitted to offspring when
Question options:

1)

the change to the DNA is temporary and gene repair is likely to occur.

2)

they occur in the cells that produce sperm or egg cells.

3)

the new protein produced is limited to a few cells and their descendants.

4)

their effect adversely influences the organism without causing its death.


Which of these statements describes transcription?
Question  options:

1)

Both strands of DNA for a particular gene are transcribed.

2)

All of these choices.

3)

It is the process used to make rRNA, tRNA and mRNA.

4)

Only one copy of mRNA is ever made from a particular gene.



The U-G-A sequence of mRNA would be made from DNA with a sequence of
Question  options:

1)

A-C-U.

2)

G-C-T.

3)

T-A-C.

4)

A-C-T.


If a molecule of DNA contained a triplet codon G-C-A, the transfer RNA molecule would have the triplet
Question  options:

1)

C-G-T

2)

G-C-U

3)

G-C-A

4)

C-G-U


The technology of transferring a gene from a bacterium into a plant is based on the principal that
Question options:

1)

all genes have the same basic chemical components

2)

the phenotype of an organism is not altered when one gene is exchanged for another

3)

the genotypes of the bacterium and green plant are the same

4)

all genes carry the same genetic information

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