Question: 5) In eukaryotes, modification to the structure of chromatin
(such as addition of methyl groups t…
5) In eukaryotes, modification to the structure of chromatin
(such as addition of methyl groups to the DNA sequence or addition
of acetyl groups to histone proteins) can increase or decrease the
level of transcription of that gene. Some of these modifications
can be passed by generation to generation. What is the name of this
process? A) Translation B) epigenetic C) enhancer expression D)
promoter expressed E) operator suppression
6) You identified unique human protein that could help cure
Alzheimer disease. In order to mass-produce this protein, you want
to transform bacteria with this human gene. Which of the following
challenges you must address? A) The genetic code has different
codons between prokaryotes and eukaryotes B) human DNA contains
introns but bacteria do not splicing C) there is no technology
available yet to insert any gene into a bacterium D) prokaryotes do
not have ribosomes to do translation
7) Mrs., and Mr. Smith have widow peaks (dominant). Their first
child also has widows peak, but their second child doesn’t. Mr.
Smith accuses Mrs. Smith of being unfaithful to him. Is he
necessarily justified? A) Yes, the father couldn’t have had widows
peak B) Yes, Mr. Smith is homozygous dominant C) Yes, Mrs. And Mr.
Smith could both be homozygous dominant D) No, Mrs. Smith could be
homozygous recessive E) No, Mrs and Mr smith could both be
heterozygous
8) During what phase of cell division do you expect to see the
homologous chromosome attached to each other, exchanging DNA
segments with each other? A) anaphase in meiosis 1 B) prophase in
meiosis 2 C) prophase in meiosis 2 D_ anaphase in meiosis 2 E)
metaphase meiosis 2
9) which proteins allow RNA polymerase to bind to the promoter
region in Eukaryotes? A) sigma subunit B) holoenzyme C) tRNA D)
transcription factor E) DNA polymerase
10) How do you predict the level of expression of the Lac operon
will be when lactose is absent? A) low because the cell doesn’t
need energy B) high because the cell need to produce lactose so it
can enter into glycolysis C) low because there is no lactose to
breakdown so there in no need to produce the enzymes D) high
because the repressor proteins will be removed from the operator
region in the DNA
11) liver cells, mammary cells and skin cells contain the same
genome; however, their respective preteomes (all the proteins found
in a cell) vary drastically. This observation is BEST explained by
what phenomenon? A) mitosis B) crossing over C) gene expression
regulation D) genetic variation E) mutations
12) which of the following statement about operons is true? They
allow individual regulations of each individual gene in the operon
B) they are complex gene structure present in eukaryotes C) all
gene of the operon will be expressed at the same time D) their
expression cannot be regulated at the same time E) they are being
transcribed constantly
13 when is the only time that cells do not carry out
transcription? A) every time the cells need enzymes to do any
metabolic process B) only when the cell need to produce a special
secretion or product, for example when you eat a meal and cells in
the stomach need to secrete trypsin enzyme for digestion C) when
the cell is dividing by either mitosis or meiosis D) every time the
cells needs to make new protein to perform any function in the cell
E) evey time current enzymes and proteins get broken down and need
to be replaced
