MCB 2000 exam 2 questions with correct
answers graded A+
GENE - correct answer ✔✔a segment of DNA that codes for a functional molecule
Chromosome - correct answer ✔✔packed and organized DNA
Every nucleotide has - correct answer ✔✔5 carbon sugar: deoxyribose
Nitrogenous base (A,G, C, T)
Phosphate
Polymerization - correct answer ✔✔process of synthesizing DNA
DNA polymerase - correct answer ✔✔enzyme that makes DNA
RNA primer needed to start the process - correct answer ✔✔DNA
DNA gets synthesized in the - correct answer ✔✔5'-to-3' direction
DNA Replication - correct answer ✔✔The fidelity of replication is remarkable.
Errors are made but they are corrected by the proofreading activity of DNA
polymerase. DNA polymerase has 3' to 5' exonuclease activity to remove wrong
nucleotides that try to make an incorrect insertion
, TRANSCRIPTION - correct answer ✔✔The synthesis of RNA from DNA template
There are three key differences between RNA and DNA - correct answer ✔✔1.
ribose instead of deoxyribose
2. uracil instead of thymine
3. RNA is usually single stranded.
Promoter: - correct answer ✔✔short sequence of DNA that signals the start of a
gene
RNA polymerase - correct answer ✔✔the enzyme that catalyzes the formation of
RNA by transcribing DNA into RNA. Requires a DNA template. Moves 5'-3'
direction and unlike DNA there is no need for a primer.
- Repression - correct answer ✔✔trp operon, not made by cell if tryptophan is
present in media
Induction - correct answer ✔✔Induction turns on catabolic processes such as
break down of sugars
EX: lac operon Genes for lactose metabolism is only on if lactose is present in the
media
Three Goals of Recombinant DNA Technology - correct answer ✔✔Eliminate
undesirable phenotypic traits in humans, animals, plants, and microbes
Combine beneficial traits of two or more organisms to create valuable new
organisms
Create organisms that synthesize products humans need
answers graded A+
GENE - correct answer ✔✔a segment of DNA that codes for a functional molecule
Chromosome - correct answer ✔✔packed and organized DNA
Every nucleotide has - correct answer ✔✔5 carbon sugar: deoxyribose
Nitrogenous base (A,G, C, T)
Phosphate
Polymerization - correct answer ✔✔process of synthesizing DNA
DNA polymerase - correct answer ✔✔enzyme that makes DNA
RNA primer needed to start the process - correct answer ✔✔DNA
DNA gets synthesized in the - correct answer ✔✔5'-to-3' direction
DNA Replication - correct answer ✔✔The fidelity of replication is remarkable.
Errors are made but they are corrected by the proofreading activity of DNA
polymerase. DNA polymerase has 3' to 5' exonuclease activity to remove wrong
nucleotides that try to make an incorrect insertion
, TRANSCRIPTION - correct answer ✔✔The synthesis of RNA from DNA template
There are three key differences between RNA and DNA - correct answer ✔✔1.
ribose instead of deoxyribose
2. uracil instead of thymine
3. RNA is usually single stranded.
Promoter: - correct answer ✔✔short sequence of DNA that signals the start of a
gene
RNA polymerase - correct answer ✔✔the enzyme that catalyzes the formation of
RNA by transcribing DNA into RNA. Requires a DNA template. Moves 5'-3'
direction and unlike DNA there is no need for a primer.
- Repression - correct answer ✔✔trp operon, not made by cell if tryptophan is
present in media
Induction - correct answer ✔✔Induction turns on catabolic processes such as
break down of sugars
EX: lac operon Genes for lactose metabolism is only on if lactose is present in the
media
Three Goals of Recombinant DNA Technology - correct answer ✔✔Eliminate
undesirable phenotypic traits in humans, animals, plants, and microbes
Combine beneficial traits of two or more organisms to create valuable new
organisms
Create organisms that synthesize products humans need
