Download Review-Qs-for-modern-genetics

Review Questions for Modern
Genetics
Match the description with the term
or phrase.
1. adenine
C
2. phosphorus
C
3. thymine
A
4. uracil
B
5. purines
C
6. pyrimidines C
7. phosphodiester bonds
C
8. deoxyribose
A
B
9. ribose
C
10. 5 carbon sugar
11. glucose
D
12. nucleotides
C
A. In DNA and not
RNA
B. In RNA and not
DNA
C. In both DNA
and RNA
D. In neither DNA
nor RNA
Match the description with the term
or phrase.
1. Poly-A tail B
2. TATA box A
3. Binding site(s) for transcription
factors A
4. Binding site for amino acid B
5. enhancer A
6. activator D
7. Binding site for repressor A
8. Promoter A
9. Found in nucleus C
10. Found in cytoplasm B
A. DNA and not
RNA
B. RNA and not
DNA
C. both DNA and
RNA
D. neither DNA
nor RNA
Put the descriptions where they belong
Transcription
Occurs in the nucleus
Produces RNA
Translation
RNA polymerase
Begins with the
binding of the
promoter
Occurs in the cytoplasm
Produces polypeptide
Uses energy
Uses a DNA template
Produces water
Occurs in cytosol of
prokaryotes
Is followed by RNA processing in
RNA template
Uses enzymes
Put the terms where they belong
Prokaryote
5’ GTP cap
nucleus
Poly-A tail
Removes introns
transcription
Splices exons
translation
Free ribosomes
Eukaryote
Ribosomes on ER
Histone proteins
One kind of RNA
polymerase
Linear
chromosomes
Circular
3 kinds of RNA polymerase
chromosome
Put the following in order of their
use during DNA replication.
• DNA polymerase
• Primase (an RNA
polymerase)
• Ligase
• SSBP’s
• Helicase
1. Helicase
2. SSBP’s
3. Primase (an RNA
polymerase)
4. DNA polymerase
5. Ligase
True or False: If the statement is false,
replace the underlined word/phrase to
make the statement read true.
1. The main enzyme involved in DNA replication is RNA
polymerase. FALSE – DNA polymerase.
2. To determine the amino acid, look up the three base
anticodon on the genetic dictionary FALSE – codon.
3. Ligase joins DNA fragments of the lagging strand. TRUE
4. DNA polymerase lengthens the new strands from 3’ to
5’. FALSE – 5’ to 3’
5. The enzyme telomerase shortens the telomeres with
each replication. FALSE – lengthens
6. Primers are made of short segments of DNA. FALSE – RNA
7. Adenine, Guanine, Thymine, Cytosine and Uracil are
examples of nucleic acids. FALSE – nitrogenous bases
Which of the following does not belong? Write
one or two sentences using the other words that
explain how all the other words are related.
1. DNA polymerase, aminoacyl-tRNA synthetase,
ligase, helicase, primase
Aminoacyl-tRNA synthetase joins amino acids to tRNA during translation, not replication.
During replication, helicase unwinds and separates DNA strands, primase creates the RNA
primers, DNA polymerase extends the new DNA strands, and ligase joins Okazaki fragments.
2. ribosome, tRNA, methionine, initiation, mRNA,
stop
codon,
primer
Primer is needed to begin DNA replication. During translation, mRNA binds between the
two subunits of the ribosome, tRNA carries the first amino acid methionine to the ribosome
during the initiation phase of translation and the stop codon signals termination of
translation.