SUBSCRIBE
BIOS 100 Exam 3
- Pre-lecture 8
Drag the organelle labels of Group 1 to the appropriate targets.Then identify the function of
each organelle on the target below it.:
Answer See Diagram
2. Which of the following statements is correct regarding chromosomes?:
Answer Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus.
3. What is the main function of the nucleus?:
Answer To hold all of the DNA
4. How is DNA linked to the production of proteins?:
Answer DNA holds the instructions for the cells on how to make proteins.
5. Part A - Which of the following is used to construct a molecule of DNA?:
Answer Nucleotides
- Part B - Overall, a molecule of DNA has a negative charge. Which compo- nent of DNA
gives it this charge?:
Answer The phosphate group
- Part C - If thymine (T) makes up 20% of the bases in a DNA double helix, what
percentage of the bases is guanine (G)?:
Answer 30%
- Part D - If one polynucleutide strand of DNA has CTTGACTAGCTA as its sequence of
bases, what would be the sequence of bases on the opposite strand?:
Answer TGAACTGATCGAT
- Part E - Place the following steps of DNA replication in the proper order: DNA
fragments are fused together; double helix is pulled apart; new strands of DNA are
synthesized.: 1 / 2
SUBSCRIBE
Answer Double helix is pulled apart, new strands of DNA are synthesized, and DNA fragments are fused together
- A drug that inhibits DNA ligase but not DNA polymerase is added to a cell. Explain how
DNA replication would be affected as a result of the drug.:
Answer The new DNA fragments would not be fused together and the backbone of the DNA would be incomplete
- Part G -You are a biochemist and have been given a test tube containing a small amount of
- Part H - Correct the following: RNA --> protein --> DNA:
nucleic acid.You have been asked to determine whether it is DNA or RNA. Which of the following would be a characteristic that indicates RNA? [Select all that apply.]: Answer only 2 of the items are checked off
Answer DNA --> RNA --> protein
13. Translation converts the information stored in into .:
Answer RNA; a protein
- Part J - A series of three nucletodies that specifices an amino acid is a(n) .:
Answer a codon
- Where does the bond form that binds one strand of DNA to its other strand?Know
this will be on test.:
Answer Between the bases
- According to the base pairing rules of DNA, if the sequence of bases on one strand
was AGGCTTA, what would be the sequence of bases on the complementary strand?
DON'T GET DNA AND RNA CONFUSED. Remember RNA does not have the T, it has U.:
Answer TCCGAAT
- Which part of a nucleotide molecule in DNA encodes genetic information? See Section 6.1
(Page) .:
Answer the baseCorrect: Genetic information is encoded in the four-letter alphabet that corresponds to the four bases: adenine, guanine, cytosine, and thymine.
- / 2