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Cartes-fiches
Which of the following codons cannot be recognized by a tRNA molecule?
The two-dimensional structure of tRNA resembles a(n):
Which of the molecules are involved in the initiation of translation in prokaryotes?
Amino acids are carried to the site of protein synthesis by
What are the two basic types of ribosomes?
The function of tRNA is to
Translation is when
Transcription and translation of a gene compsed of 60 nucleotides would form a protein containing no more than ___ amino acids
DNA helicase is involved during the process of
So called "core particle" of the nucleosome consits of 145-147 bp of DNA wrapped around
What compunds are bonded together to make polypepties?
How many codons encoding amino acids are there?
How many tRNA molecules are present in one cell?
Where are the proteins synthesized in a cell?
The production of RNA copies of the DNA is called ... and is performed by ... which adds one RNA nucleotide at a time to a growing RNA strand
Prokaryotes and eukaryotes use several methods to regulate gene expression, but the most common method is
A(n) ... is a piece of DNA with a group of genes that are transcribed together as a unit
What effect would the addition of lactose have on a repressed lac operon?
Eukaryotic RNA polymerase II synthesizes
The two protein subunits of the leucine zipper are held together
A type of DNA sequence that is located far from a gene but can promote its expression is a(n)?
Which of the following is NOT found in a eukaryotic transcription complex?
Assembly of basal transcription factors begins at the ________ sequence in the promoter.
Which of the following statements about enhancers is TRUE?
The interaction of activators, coactivators and basal transcription factors involves the formation of a loop in the DNA
Regulatory proteins called repressors can decrease the rate of transcription by binding to the promoter
Which of the following are NOT matched correctly?
Which of the following is NOT a method of posttranscriptional control in eukaryotic cells?
Nucleosomes are packed together with the aid of
EF-Tu and EF-Ts factors are involved in the process of
The primers required for DNA synthesis are replaced with DNA by the following enzyme
How many times is a cell's DNA replicated before the cell divides?
A mRNA is 336 codons long, including the start and the stip codons. The number of amino acids in polypeptide chain initailly translated from the mRNA is
A murder has occured and you are asked to help solve it. The police bring you a sample from the crime scene of what they believe is the killer's DNA and ask you for a chemical analysis. Your study of this sample reveals the presence of adenine, thymine, ribose and uracil. Which of the following is the best conclusion to draw from these results?
Okazaki fragments are formed because
In this diagram, the black boxes, signed as D and E, are:
The other name of the prokaryotic elongation factor EF-G:
A functional molecule of mRNA consists of 32 nucleotides. How many amino acids, present in the polypeptide chain, are synthesized?
Euchromatin is:
The following codons can act as STOP codons:
