BIOC 3021 EXAM QUESTIONS AND ACCUARATE ANSWERS 2024/2025 | VERIFIED
tRNA - Transfer RNA
Decodes mRNA into a protein
Functions at the ribosome during Translation
rRNA - Ribosomal RNA
Essential for protein synthesis
Predominant material in a ribosome (60%)
Catalyzes polypeptide formation (Ribozyme)
mRNA - Messanger RNA
Conveys genetic info from DNA to ribosome
Specifies the amino acid sequence of protein products
Which type of RNA catalyzes the synthesis of proteins? - rRNA
What enzyme complex makes DNA from RNA? - Reverse transcriptase
The first half of DNA restriction site has the sequence AACC, what are the next four bases on the same
chain? - GGTT
What percentage of human chromosomal DNA codes for proteins? - 1-2%
DNA replication involves the nucleophilic attack on a deoxynucleotide phosphate by a: - 3'
hydroxyl group of deoxyribose
What additional factor does lagging strand DNA synthesis require that is not needed for leading strand
synthesis? - a DNA ligase
, Various forms of DNA that vary in the degree of winding are called: - Topoisomers
If the first four bases are ATGC, what are the next four bases on the SAME DNA strand? - GCAT
During DNA replication the lagging DNA strand is READ at its: - 3' end
In addition to hydrogen bonding, the stability of double helix between complementary DNA chains is
promoted by? - Aromatic stacking
In the structure of ATP the inner phosphate group is joined to the 5' carbon of ribose by what type of
bond? - Phosphoester
What feature is found in DNA synthesis but NOT in RNA synthesis? - Repair mechanisms which
remove incorrect bases
Which statement is TRUE about ribosomes? - Protein synthesis is catalyzed by ribosomal RNA
The process of cutting DNA strands at specific sites is accomplished by? - Restriction
endonucleases
Which of the following is needed for replication of DNA but NOT for transcription of DNA to RNA? -
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 - 3600 bases (3 for each AA)
Which of the following statements is TRUE about the coding strand of DNA? - 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: - GU and AG
tRNA - Transfer RNA
Decodes mRNA into a protein
Functions at the ribosome during Translation
rRNA - Ribosomal RNA
Essential for protein synthesis
Predominant material in a ribosome (60%)
Catalyzes polypeptide formation (Ribozyme)
mRNA - Messanger RNA
Conveys genetic info from DNA to ribosome
Specifies the amino acid sequence of protein products
Which type of RNA catalyzes the synthesis of proteins? - rRNA
What enzyme complex makes DNA from RNA? - Reverse transcriptase
The first half of DNA restriction site has the sequence AACC, what are the next four bases on the same
chain? - GGTT
What percentage of human chromosomal DNA codes for proteins? - 1-2%
DNA replication involves the nucleophilic attack on a deoxynucleotide phosphate by a: - 3'
hydroxyl group of deoxyribose
What additional factor does lagging strand DNA synthesis require that is not needed for leading strand
synthesis? - a DNA ligase
, Various forms of DNA that vary in the degree of winding are called: - Topoisomers
If the first four bases are ATGC, what are the next four bases on the SAME DNA strand? - GCAT
During DNA replication the lagging DNA strand is READ at its: - 3' end
In addition to hydrogen bonding, the stability of double helix between complementary DNA chains is
promoted by? - Aromatic stacking
In the structure of ATP the inner phosphate group is joined to the 5' carbon of ribose by what type of
bond? - Phosphoester
What feature is found in DNA synthesis but NOT in RNA synthesis? - Repair mechanisms which
remove incorrect bases
Which statement is TRUE about ribosomes? - Protein synthesis is catalyzed by ribosomal RNA
The process of cutting DNA strands at specific sites is accomplished by? - Restriction
endonucleases
Which of the following is needed for replication of DNA but NOT for transcription of DNA to RNA? -
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 - 3600 bases (3 for each AA)
Which of the following statements is TRUE about the coding strand of DNA? - 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: - GU and AG
