Mitosis, DNA/RNA, Gene Expression, Gene Regulation

Flashcards for BISC 160
Questions about Mitosis, DNA, Transcription and Translation, and Genes....

59 cards   |   Total Attempts: 182
  

Cards In This Set

Front Back
What are double ringed nitrogenous bases called, and what are they?
Purines/ guanine and adenine
What are single ringed nitrogenous bases called, and what are they?
Pyrimidines/ cytosine and thymine (they all have ''y's")
What is the name of the rule that refers to the complementary nature of DNA? (Number of Adenine = Number of Thymine and Number of Cytosine = Number of Guanine)
Chargaff's Rule
The process of DNA making a copy of itself is called
Replication; average speed: 20 nucletides per second are added to new strand
When replication is completed, each molecule will have one original template strand. This is called
Semi-conservative replication
In DNA replication, new strands always begin at its __ end and nucleotides are added to its __ end.
5' , 3'
Enzymes responsible for building a DNA polymer; there are more than one kind; they catalyze the addition of nucleotides to the 3' end of the strand and cannot start the strand
DNA polymerases
Molecules in the nucleus that provide the substrates to build a new strand of RNA or DNA; have 3 phosphate groups
Free nucleotides
Specific sequences on the DNA template strand where replication begins
Origin of replication
Giant cloud of molecules that contain all enzymes, all substrates, and everything needed for replication --moves along the DNA molecules--replication only occurs where this is
DNA replication machine
Enzyme responsible for pulling the DNA helix apart; breaks hydrogen bonds
DNA helicase
Proteins that bind to the strands, keeping them apart so replication can occur
Single-strand binding proteins
Point where the two template strands of DNA are being pulled apart (y-shaped structure)
Replication fork
New strand built in the same direction that the replication fork is moving
Leading strand
New strand built in the opposite direction of the movement of the replication fork
Lagging strand