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BIOC 3021 Exam Questions and Answers 100% Solved | Graded A+
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BIOC 3021 Exam Questions and Answers 100% Solved | Graded A+ 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) ...

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  • December 7, 2024
  • 19
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • BIOC 3021
  • BIOC 3021

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BIOC 3021 Exam Questions and

Answers 100% Solved | Graded A+


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



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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

,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
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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, 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

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? - ✔✔2

In RNA synthesis to which base in the DNA is the U in the RNA product

paired? - ✔✔A

At neutral pH, DNA carries a negative charge because of the -

✔✔Phosphate



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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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