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Molecular Biology Basics Flashcards | StudBud

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How does a homeotic gene mutation affect a fly?

What’s one key difference between RNA and DNA?

Molecular Biology Basics

11 terms·StudBud Administration

Test your knowledge on fundamental concepts in molecular biology, from RNA and DNA differences to gene regulation mechanisms in prokaryotic and eukaryotic cells.

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Questions 11

Answers

1
What’s one key difference between RNA and DNA?
RNA is single-stranded
RNA has more nucleotides
RNA has thymine
DNA is shorter than RNA
2
How does a homeotic gene mutation affect a fly?
Changes its eye color
Grows a leg where antenna should be
Stops transcription
Increases mRNA production
3
How do eukaryotic cells mainly regulate genes?
Via independent assortment
With transcription factors
Using operons
Through lac repressors
4
What process makes RNA in the cell?
Translation
Mutation
Replication
Transcription
5
What’s the role of the lac repressor in E. coli?
Activates Hox genes
Binds promoter to start transcription
Binds operator to block transcription
Cuts mRNA to stop proteins
6
What turns the lac operon 'on' in E. coli?
TATA box activation
miRNA silencing
Glucose presence
Lactose binding to repressor
7
True or false: RNA is always double-stranded.
False
True
8
What environmental factor can influence gene expression?
TATA box in eukaryotes
Hox genes in flies
Lactose in E. coli
miRNA in plants
9
What are the three main types of RNA?
mRNA, miRNA, siRNA
DNA, RNA, mRNA
rRNA, tRNA, miRNA
mRNA, tRNA, rRNA
10
How does RNA interference (RNAi) stop gene expression?
Editing DNA directly
Using miRNA to destroy mRNA
By activating transcription factors
Binding lactose to repressors
11
What does the TATA box do in eukaryotic cells?
Helps RNA polymerase start transcription
Silences mRNA
Mutates genes
Blocks transcription