Upgrade to remove ads
Terms in this set (32)
What are histones and what is their purpose?
Histones are basic proteins that help condense DNA into chromatin
Histones contain four core subunits...
How many copies of subunits do histones have?
By having two copies of subunits within a histone, the histone can be identified as an...
When DNA wraps around a histone, this forms a ...
Chromatin is formed by the tight collection and bundle of ...
Chromosomes are composed of two different regions...
Euchromatic and Heterochromatic
_____ regions are less compact, involve less repeats, and make up most of the genome
_______ regions are more compact, involve more repeats, and make up less of the genome
Which region of the chromosome is usually sequenced?
In the center of the chromosome is the ______ and at the ends of the chromosome are _______
Center = centromere
Ends = telomere
The telomere and centromere usually contain ______ regions
Telomers are located at the ends of chromosomes and contain a large number of _________ segments
Why do telomeres get shorter during replication?
The RNA primer on the last Okazaki fragment can't be replaced by DNA polymerase I
What happens to the cell if the telomers shorten too much?
It can become unstable and may be destroyed
The point at which sister chromatids are attached is the ...
The point of the mitotic spindle attaches to the ...
What is the TATA box?
A DNA sequence in eukaryotic promotors crucial in forming the transcription initiation complex
The TATA box is usually 25-35 base pairs upstream from the ______ site
What is the function of the TATA box?
It seems to help position RNA polymerase II by marking a point just before the point where transcription begins
The TATA box is a core piece of the _____ region
______ factors help RNA polymerase to bind to promoter
_______ have a similar function to promoters
Enhancer regions can be affected by ______ factors
What is the purpose of an enhancer region?
To increase the rate of transcription
What happens to DNA when an enhancer region is activated?
The DNA bends
Enhancers can be _______ or _______ from a promoter region
Upstream or downstream
Enhancer regions take on the binding of ________ proteins
_______ regions are located near enhancer regions. When repressors bind to them, activator proteins can no longer bind to enhancer regions
Silencer regions involve the binding of _______ proteins
There are _______ types of RNA polymerase and each require a different set of proteins and promoters
Which type of RNA polymerase is used in transcription?
RNA Polymerase II
THIS SET IS OFTEN IN FOLDERS WITH...
Metabolism of Fats and Proteins
DNA and Protein Synthesis
Enzymes and Metabolism
OTHER SETS BY THIS CREATOR
Laws, Principles, Rules
OTHER QUIZLET SETS
2021 LFD FOGS Book 1 Section 1
CSAD 614 - Evaluation