WorksheetsAL Control of gene expression
Total questions: 10
Worksheet time: 7mins
State the term for a cluster of genes in a prokaryote controlled by the same promoter
(a)
A regulatory gene encodes for which of the following?
An enzyme
A repressor protein
A membrane bound protein
A hormone
Identify the enzyme that catalyses transcription
(a)
Identify the molecule that breaks down DELLA proteins
Auxin (IAA)
Lactose
Gibberellic acid
trp
Identify the genotype of a plant that does not produce the gibberellins required for stem elongation
le le
Tt
Le Le
Le le
State the term for the observable features of an organism
(a)
An inducible enzyme is only synthesised in which conditions?
When a repressor protein is synthesised
Only when its substrate is present
Only when its substrate is absent
When a suitable transcription factor is present
The lac repressor protein binds to which of the following structures?
Structural gene
Attenuator
Promoter
Operator
A repressible enzymes synthesis will be inhibited in which of the following conditions?
When a transcription factor binds to the operator
When a substrate is absent
When an effector molecule binds to the repressor
When a transcription factor has been activated by a hormone
Which of the following are not found in prokaryotes?
Transcription factors
Operators
Promoters
RNA polymerases
