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Which is the mRNA transcription of the following DNA? (note, in this case, transcription is proceeding from left to right) 5' AATTCG 3' 3' TTAAGC 5'

B. 5' AAUUCG 3'

DNA polymerase synthesizing the leading strand

B. Synthesizes continuously the 5'-->3' strand

Which is a product of transcription?

B. messenger RNA C. transfer RNA D. ribosomal RNA

During elongation, which enzyme synthesizes the bond between amino acids ?

B. peptidyl transferase

Translation in eukaryotes takes place in the

B. the rough endoplasmic reticulum (RER) C. the matrix of the mitochondria

Which is the complementary sequence of the following DNA strand? Note: pay attention to the orientation 5' ATTCGGAA 3'

3' TAAGCCTT 5'

Strand A is one of the parental strands, strand B is the newly replicated strand. Which of the following would represent the second parental strand? Note: pay attention to orientation of strands. 5' AATTC 3' newly replicated strand 3' TTAAG 5' parental strand

5' AATTC 3'

DNA polymerase synthesizes the lagging strand

A. synthesizes Okazaki fragments, which will make up the 3'-->5' strand

Postranscriptional modification

A. Takes place in eukaryotes

Prokaryotic mRNA

A. is polycistronic B. is not modified after transcription C. Uses AUG as the start codon of each transcript.

DNA replication --

A. is semiconservative B. needs two DNA polymerases C. is bidirectional

Cells regulate protein synthesis by stopping:

A. transcription

Translate the following mRNA: 5' AUGAAUCGCUUAUGA 3'

C. Methionine - asparagine-arginine-leucine-STOP

Which is true of RNA polymerase?

C. RNA polymerase synthesizes in the 5' --> 3' direction only

A tRNA with an anticodon of 3' GUA 5' will have the amino acid ------------ at the opposite end

C. histidine

In the presence of glucose, and lactose, the lac operon...

C. is off, because glucose prevents transcription

The sequence of 3 nucleotide bases in a mRNA are 'read' in translation as a sequence of

D. one amino acid

Helicases

E. Unwinds the double stranded DNA helix

Ligases

F. Enzyme bonds together Okazaki fragments

RNA polymerase binds to the promoter region, and starts translation.

False

Stabilizing proteins

Keep DNA strands separated

Primase

Synthesizes the short RNA sequences from which DNA polymerases can elongate

Plasmids are small, circular pieces of double stranded DNA found in prokaryotes. These DNA pieces replicate independently to the cell's chromosome, and carries information non-essential to the survival of the cell.

True

The RNA molecule with an anticodon at one ends, and the corresponding amino acid at the other end is the tRNA

True

A type of plasmid carrying genes that make a cell resistant to antibiotics is called

an R-factor

Which is true of DNA polymerase enzyme?

can synthesize DNA in the 5' --> 3' direction

Which is a component of DNA?

deoxyribose a phosphate group nitrogenous base

Which is true of double stranded DNA molecules?

double stranded DNA molecules are antiparallel and complementary

Which is true of prokaryotic DNA?

it has one origin of replication it is found in the nucleoid of the cell it is circular

Which is true of eukaryotic chromosomal DNA?

it is double stranded it is linear it is found in the nucleus of the cell

Which is the inducer of the 'lac operon'?

lactose

Extranuclear eukaryotic DNA is found in the

mitochondria

DNA replication is an anabolic polymerization process which synthesizes DNA from nucleotides. The building blocks and the energy needed for DNA replication is provided by :

nucleotides

The backbone of a DNA molecule is made by the

sugar of one nucleotide covalently bonded to the phosphate of the next nucleotide.

DNA replication is semiconservative, which means

that when a cell replicates its DNA, and splits into two cells, each daughter cells receives the one parental strand, and one replicated strands.

In the process of protein synthesis, transcription refers to the process that makes an RNA copy of a DNA gene

true

Many ribosomes, translate a mRNA, producing many copies of the polypeptide the mRNA codes for.

true

More than one RNA polymerase binds to the promoter, bind and transcribe DNA, providing multiple copies of mRNA to be translated

true