What is the difference between negative and positive control?

Pos: increases transcription Neg: operons are turned off

What do miRNA and siRNA do?

Block translation of certain mRNA

Regulation of mRNA is by...

miRNA (micro RNA), siRNA (small interfering RNA)

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Gene Regulation

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A #math #blindquiz to introduce the basics of #algebra to #8grade

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Questions 20

Answers

1
What is the difference between negative and positive control?
Pos: increases transcription Neg: operons are turned off
Pos: operons are tuned on Neg decrease transcription
pos: operons are turned on Neg: operons are turned off
pos: increase transcription neg: decrease transcripton
2
what are molecules produced by one cell influences neighboring cells?
neutrotransmitters
local regulators
synaptic signals
cell-cell signals
3
what is the irreversible series of events that lead to cell differentiation
determination
differentiation
specification
arangment
4
What is the role of homeotic genes?
master regulatory gene
master control gene of gene expression
Secondary pattern formation gene
genes that controls cell differentiation
5
What happens to mutated proto-oncogenes?
they stop dividing cells
they become unregulated
They cause cancer
they become undifferentiated
6
What does the regulatory gene do?
Regulate the operon
Bind to a repressor
Produce a repressor protein
produce a molecule to bind to a repressor
7
What is most needed for RNA polymerase to bind to DNA
mRNA
mediator proteins
Transcription factors
DNA bending-protein
8
What do miRNA and siRNA do?
Block translation of certain mRNA
Block the translation of certain DNA
increase the rate of translation in certain mRNA
9
Regulation of mRNA is by...
Activators
miRNA (micro RNA)
all three
siRNA (small interfering RNA)
10
Where does RNA polymerase bind to on DNA
Anywhere on the gene
Initiation complex
Other proteins
TATA box
11
Operons are used in what organism?
bacteria
eukaryotic organisms
12
Epigenetic Inheritance is NOT
Gene silencing
Modification on chromatin
histone acetylation
a DNA mutation
13
Activators bind to
The promoter
TATA box
Enhancing regions
initiation complex
14
Pattern formation is
setting up changes in patterns
Setting up the body plan
setting up patterns in body functions
setting up the gene patterns
15
Inducible operons are normally on.
Yes
False
No
True
16
p53 and ras genes are involved in what.
Gene expression
Cancer
Cell diffenentiation
Cell regulation
17
What determines is a eukaryotic gene is expressed.
Available Activators
Available mediator proteins
Available transcription factors
Available RNA polymerase
18
What binds to control elements?
Both
Activators
Repressors
Nither
19
Which increases the rate on transcription?
Histone acetylation
DNA methylation
20
Which is not part of an operon?
Operator
Promoter
Regulator
Genes

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