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AP Bio 19-21 Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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AP Bio 19-21 Exam | Questions And Answers Latest {2024- 2025} A+ Graded | 100%Verified
Chromatin - DNA-Protein complex, in eukaryotes it's ordered into higher structural levels than in
prokaryotes
Histones - Proteins that are responsible for the 1st level of DNA packing in chromatin
Nucleosome - Basic unit of DNA packing, "bead". 5 types
Cell Differentiation - A process multicellular organisms undergo, a process of specialization in form and
function resulting in several cell types. Hard to reverse
Differential Gene Expression - Differences between cell types, allows cells to be different. 20% expressed
at a time
Histone Acetylation - Acetyl groups are attached to positively charged lysines in histone tails. If this is
tight, RNA polymerase can't attach
Genomic Imprinting - Methylation permanently regulates expression of Maternal or Paternal allele of
certain genes at start of development.
Transcription Factors - Required by eukaryotic cells, RNA Polymerase to initiate transcription. When
completely is completely assembled, polymerase can begin producing RNA from DNA
Control Elements - Segments of non-coding DNA that help regulate transcription
Enhancers - AKA Distal Control Elements, located farther from the promoter (up stream), one gene can
have multiple
Activator - Steroids bind to specific intracellular receptor protein which serves as transcription activator.
Stimulates transcription
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