B.E. Chpt 12

DNA is composed of sugars, bases, and_____
A. ) hydrogens
B. )chlorines
C. )phosphates
D. ) peptides

In DNA, Adenine bonds with ______
A. ) Cytosine
B. Guanine
C. ) Thymine
D. ) hydrogens

The model of DNA was first built by __________
A. ) Hershey-Chase
B. ) Watson-Crick
C. ) Pauling
D. ) Griffith

Which of the following is NOT found on a strand of DNA?
A. ) hydrogen bonds
B. ) uracil
C. ) thymine
D. ) deoxyribose

Where in the cell does DNA replication take place?
A. ) cytoplasm
B. ) rough ER
C. ) nucleus
D. ) ribosome

Hershey- Chase concluded that ____________
A. ) RNA was the genetic material
B. ) DNA and RNA were found in the cell's nucleus
C. ) DNA was the genetic material
D. ) Protien bases were the genetic material

All of the following are true about the structure of DNA ecxcept___________
A. ) the long strand of nucleotides are twisted into a double helix
B. ) DNA consists of two long strands of nucleotides joined by hydrogen bonds
C. ) DNA is a single strand of nucleotides
D. ) every DNA nucleotide contains sugar, phosphate, and a base

X-ray diffraction photographs were taken by?
A. ) Hershey-Chase
B. ) Wilkins and Franklin
C. ) Pauling
D. ) Griffith

The amount of guanine is always equal to the amount of______?
A. ) thymine
B. ) cytosine
C. ) protein
D. ) adenini

during DNA replication, what would be the complementary strand of CCTAGCT?
A. ) GGATCGA
B. )TTGCATG
C. ) CCTAGCT
D. )GGGAUGA

the enzyme responsible for adding new nucleotides to the growing DNA strand in DNA replication is?
A. ) DNA polymerase III
B. ) DNA polymerase I
C. ) helicase
D. ) RNA polymerase

New DNA nucleotides must always be added to the _____ end of the growing strand.
A. ) 3'
B. ) a or b
C. ) phosphate
D. ) 5'

The enzyme responsible for unwinding the DNA during replication is ___?
A. ) DNA polymerase I
B. ) helicase
C. ) RNA polymerase
D. ) DNA polymerase III

If a mutation during DNA replication were to occur, what enzyme corrects the mutation?
A. ) DNA polymerase III
B. ) RNA polymerase
C. ) DNA polymerase I
D. ) helicase

The function of rRNA is to __?
A. ) Synthesize mRNA
B. ) transfer amino acids to ribosomes
C. ) form ribosomes
D. ) synthesize DNA

During transcription,_________
A. ) DNA is replicated
B. ) Proteins are synthesized
C. ) RNA is produced
D. ) Translation occurs

dWhat enzyme unwinds DNA and produces complementary RNA nucleotides during transcription?
A. ) DNA polymerase I
B. ) DNA [olymerase III
C. ) helicase
D. ) RNA polymerase

Transcription proceeds when RNA polymerase ______
A. ) binds to a strand of RNA
B. ) attaches to a ribosome
C. ) attaches to a promoter on the DNA
D. ) binds to a strand of DNA

The operon consists of ___________
A. ) repressors
B. ) operator and repressors
C. ) promoter and operator
D. ) promoter and repressors

Each nucleotide triplet in mRNA that specifies as particular amino acids is called a(n)
A. ) exon
B. ) anticodon
C. ) mutagen
D. ) codon

Which of the following would represent the strand of DNA from wich the mRNA strand CUCAAGUGCUUC was made?
A. ) GAGUUCACGAAG
B. ) CUCAAGUGCUUC
C. ) GAGTTCACGAAG
D. ) AGACCTGTAGGA

each of the following is a type of RNA exept?
A. ) ribosomol RNA
B. ) messenger RNA
C. ) transfer RNA
D. ) carrier RNA

At the very beginning of translation, the first tRNA molecule
A. ) attaches directly to tthe DNA codon
B. ) binds to the ribosome's A site
C. ) attaches to the P site of the ribosome
D. ) connects an amino acid to its anticodon

The first amino acid for any protien is _
A. ) methionine
B. ) leucine
C. ) trypotophan
D. ) proline

in order for protein synthesis to occur, mRNA must migrate to the _
A. ) cytoplasm
B. ) mitochondria
C. ) plasma membrane
D. ) nonn of the above

during translation, mRNA is made into
A. ) proteins
B. ) DNA
C. ) tRNA
D. ) ribosomes

during translation, the amino acids are held together by _
A. ) phosphates
B. ) peptide-bonds
C. ) sugars
D. ) hydrogen bonds

the function of an operator is to
A. ) regulate access of RNA polymeraseto specific genes
B. ) control the introns and exons
C. ) generate amino acids for protein synthesis
D. ) turn on and off the molecules of tRNA

cells must control gene expression so tha
A. ) their gene will always be expressed
B. ) their genes will never be expressed
C. ) their genes will only be expressed when needed
D. ) genetic disorders can be corrected

A repressor protein
A. ) destroys amino acids befor protein synthesis occurs
B. ) blocks RNA polymerase from attaching to the DNA
C. ) prevents DNA synthesis
D. ) attaches to the ribosome during translation

the non-coding region of DNA that is not transcribed is
A. ) mutons
B. ) exons
C. ) exoposons
D. ) introns

during translation, after the P site is filled what is the next site to recieve a tRNA molecule?
A. ) E site
B. ) G site
C. ) stop site
D. ) A site

what type of mutatio