Molecular Genetics
Molecular Genetics / Nucleic acids / DNA replication&transcription / Genetic code / mRNA translation
Molecular Genetics / Nucleic acids / DNA replication&transcription / Genetic code / mRNA translation
What is the name of the enzyme responsible for ….. the DNA molecule for replication
Which of the following are correctly associated:
The enzyme called peptidyl transferase catalyzes the formation of:
Indicate the correct stages of chromatin condensation:
The genetic code is commaless because:
A, B, C and D in the picture represent
…. DNA transcription occurs in:
The enzyme catalysing the attachment of an amino acids to the tRNAs …:
In the picture below arrows number 1 indicate template strands the other number are:
At which position of the deoxyribose ring is the nitrogenous base attached:
C4: phosphate group
ATTThe triplet base sequence in DNA template strand that is translated into a stop codon is:
The lac repressor protein binds to the operator region:
Which of the following are not correctly associated:
The result of the transcription process is:
Which of the following statements is true:
The operator gene of the lac operon:
RNA molecule is:
The other name of the prokaryotic elongation factor EF-G:
The enzyme of RNA polymerase participates in which process?:
The genetic code is non-overlapping because:
RNA is
Where are proteins synthesized in a eukaryotic cell?
The codons UAA, UAG and UGA all code for
With the exception of tryptophan and methionine, each amino acidis coded for by more than one codon. Therefore the genetic code is called
Anticodon is found on:
The entire genetic code consists of ___ amino acids and ___ codons
Which compunds are bonded together to make polypeptides?
Meselson and Stahl proved that
In Prokaryotes DNA transcription occurs in
At the beginning of the DNA transcription, RNA polymerase binds to
The longest molecule in our cells are
Which of the following statements is true about the protein synthesis process?
The elongation of a polypeptide chain continues until
Lactose operon is an example of
Transcription occurs along a (1) template strand forming an mRNA molecule in the (2) direction
(1) 3' to 5' ; (2) 5' to 3'
The process in which ribosomes are involved is
During translation, the ___ site within the ribosome holds the growing amino acid chain while the ... site holds the next amino acid to be added to the chain
Reverse transcription is the process in some viruses by which ___ is synthesized from ___
How does the presence of lactose cause the lac operon to be transcribed?
Okazaki fragments occur on the ___ and are bonded together by ___
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Flashcards
The sequence of DNA 3’-ACCGTTACC-5’ would be replicated as follows:
In prokaryotes, the enzymes possessing error-checking and repairing activities during the DNA replication are:
Indicate the FALSE sentence
DnaA and DnaG factors are involved in the process of:
START codon is:
Once transcription has been completed, which of the following is NOT necessary for protein synthesis to occur?:
Enzyme translocase is involved in:
Which molecule serves to destabilies the DNA helix in order for opens it up creating a replication fork?:
A, B, C and D in the picture represent:
Which of the following are pyramidine N-bases?:
Which processes take place in the nucleus of an eukaryotic cell?:
The process of gene transcription begins with:
A messenger RNA is 336 codons long, including the start and the stop codons. The number of amino acids in the polypeptide chain initially translated from the mRNA is:
The promoter gene of an operon:
The main 3 types of RNA studied in this course are:
If a DNA molecule is found to be composed of 40% thymine, what percentage of adenine would be expected:
RF1, RF2 and RF3 factors are involved in:
The genetic code is unambiguous because:
The enzyme abbreviated EF-Tu is involved in:
Which of the operons works by using an inducer to bind to the repressor protein and remove it, thus allowing transcription of structural genes?:
Indicate correct statement: The so-called linker (spacer)DNA
Eukaryotic RNA polymerase I synthesizes:
Which of the following statements about transcription is FALSE:
The transcribing enzyme is:
A geneticist isolated a gene for a specific trait under study. He also isolated the corresponding mRNA. Upon comparison the mRNA was found to contain 1,000 fewer nucleotides than the DNA sequence. Did the geneticist isolate the wrong DNA?:
Which of the following is true of ribosomes:
The enzymes with proof-reading and repairing activities during prokaryotic DNA replication are:
During initiation of translation:
Which of the following descriptions of transcriptions is INCORRECT:
What was the overall conclusion of the Hershey-Chase experiment?:
Largest molecules in our bodies are:
IF1, IF2 and IF3 factors are involved in:
Fragments of DNA molecule that do not contain information is called:
Which of the operons works by using a co-repressor to bind to the …. Protein and remove it, thus allowing transcription?:
Which of the following is not an RNA base:
What is the name of the enzyme responsible for helping charge tRNA molecules:
The strand on which DNA replication is performed discontinuoesly is called the:
Which of the following is not characteristic of prokaryotic terminators?:
On this diagram, the black boxes, labelled as D and E are:
What is the name of the bond that links the nitrogen base and the ribose sugar in a nucleotide?
