tRNA - ANSWER Transfer RNA
Decodes mRNA into a protein
Functions at the ribosome during Translation
rRNA - ANSWER Ribosomal RNA
Essential for protein synthesis
Predominant material in a ribosome (60%)
Catalyses polypeptide formation (Ribozyme)
mRNA - ANSWER Messanger RNA
Conveys genetic info from DNA to ribosome
Specifies the amino acid sequence of protein products
Which type of RNA catalyses the synthesis of proteins? - ANSWER rRNA
What enzyme complex makes DNA from RNA? - ANSWER Reverse
transcriptase
The first half of the DNA restriction site has the sequence AACC, what are the
next four bases on the same chain? - ANSWER GGTT
What percentage of human chromosomal DNA codes for proteins? - ANSWER
1-2%
DNA replication involves the nucleophilic attack on a deoxynucleotide
phosphate by a: - ANSWER 3' hydroxyl group of deoxyribose
What additional factor does lagging strand DNA synthesis require that is not
needed for leading strand synthesis? - ANSWER a DNA ligase
Various forms of DNA that vary in the degree of winding are called: -
ANSWER Topoisomers
, If the first four bases are ATGC, what are the next four bases on the SAME
DNA strand? - ANSWER GCAT
During DNA replication the lagging DNA strand is READ at its: - ANSWER
3' end
In addition to hydrogen bonding, the stability of double helix between
complementary DNA chains is promoted by? - ANSWER Aromatic stacking
In the structure of ATP the inner phosphate group is joined to the 5' carbon of
ribose by what type of bond? - ANSWER Phosphoester
What feature is found in DNA synthesis but NOT in RNA synthesis? -
ANSWER Repair mechanisms which remove incorrect bases
Which statement is TRUE about ribosomes? - ANSWER Protein synthesis is
catalyzed by ribosomal RNA
The process of cutting DNA strands at specific sites is accomplished by? -
ANSWER Restriction endonucleases
Which of the following is needed for replication of DNA but NOT for
transcription of DNA to RNA? - ANSWER a primer strand
In bacteria a protein with 1200 amino acids might be coded by a sequence of
DNA with an open reading frame of - ANSWER 3600 bases (3 for each AA)
Which of the following statements is TRUE about the coding strand of DNA? -
ANSWER It has the same base sequence as the transcript except for the
substitution of U's
The signals at the ends of introns in immature mRNA, that code for their
removal are: - ANSWER GU and AG
If a restriction site in a circular plasmid has the sequence GGAATTCC, and the
endonucleas cuts between A and A, how many unpaired bases will occur on
each strand at the opening that is produced? - ANSWER 2
Decodes mRNA into a protein
Functions at the ribosome during Translation
rRNA - ANSWER Ribosomal RNA
Essential for protein synthesis
Predominant material in a ribosome (60%)
Catalyses polypeptide formation (Ribozyme)
mRNA - ANSWER Messanger RNA
Conveys genetic info from DNA to ribosome
Specifies the amino acid sequence of protein products
Which type of RNA catalyses the synthesis of proteins? - ANSWER rRNA
What enzyme complex makes DNA from RNA? - ANSWER Reverse
transcriptase
The first half of the DNA restriction site has the sequence AACC, what are the
next four bases on the same chain? - ANSWER GGTT
What percentage of human chromosomal DNA codes for proteins? - ANSWER
1-2%
DNA replication involves the nucleophilic attack on a deoxynucleotide
phosphate by a: - ANSWER 3' hydroxyl group of deoxyribose
What additional factor does lagging strand DNA synthesis require that is not
needed for leading strand synthesis? - ANSWER a DNA ligase
Various forms of DNA that vary in the degree of winding are called: -
ANSWER Topoisomers
, If the first four bases are ATGC, what are the next four bases on the SAME
DNA strand? - ANSWER GCAT
During DNA replication the lagging DNA strand is READ at its: - ANSWER
3' end
In addition to hydrogen bonding, the stability of double helix between
complementary DNA chains is promoted by? - ANSWER Aromatic stacking
In the structure of ATP the inner phosphate group is joined to the 5' carbon of
ribose by what type of bond? - ANSWER Phosphoester
What feature is found in DNA synthesis but NOT in RNA synthesis? -
ANSWER Repair mechanisms which remove incorrect bases
Which statement is TRUE about ribosomes? - ANSWER Protein synthesis is
catalyzed by ribosomal RNA
The process of cutting DNA strands at specific sites is accomplished by? -
ANSWER Restriction endonucleases
Which of the following is needed for replication of DNA but NOT for
transcription of DNA to RNA? - ANSWER a primer strand
In bacteria a protein with 1200 amino acids might be coded by a sequence of
DNA with an open reading frame of - ANSWER 3600 bases (3 for each AA)
Which of the following statements is TRUE about the coding strand of DNA? -
ANSWER It has the same base sequence as the transcript except for the
substitution of U's
The signals at the ends of introns in immature mRNA, that code for their
removal are: - ANSWER GU and AG
If a restriction site in a circular plasmid has the sequence GGAATTCC, and the
endonucleas cuts between A and A, how many unpaired bases will occur on
each strand at the opening that is produced? - ANSWER 2
