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The flashcards below were created by user
Anonymous
on FreezingBlue Flashcards.
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In what phase does DNA repair processes occur?
G1
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What are the base pair "rules"?
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When phase do sister chromatids begin to arise?
S phase
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When do sister chromatids segregate?
mitotic anaphase
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T/F sister chromatids contain identical versions of the same genetic information in mitotic division
True
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When do sister chromatids join?
during prophase and mataphase
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Osmosis is a specific form of_______
Diffusion
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T/F daughter cells are genetically identical to parent cells.
True
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What is the information flow in Biology?
DNA to RNA to Protein
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What form as a result of accidental nondisjunctions?
Trisomies and momosomies
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What is deoxyribose composed of?
Deoxyribose, nitrogenous bases, and a phosphate
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What is osmosis?
diffusion of water across a membrane
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What is transcription?
synthesizing an RNA molecule using DNA as a template
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What is involved in semiconservative replication?
each of the origional strands act as a template for new strands
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what is facilitated diffusion?
using a carrier protein/transmembrane protein to cross a membrane
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What does RNA polymerase do?
directs mRNA synthesis by transcription of DNA message
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If the gentic code was based on 2 nitrogenous bases per codon, what would the maximum number of amino acids be?
16
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What is determined by independent assortment?
tbe proportion of genetic material in a gamete inherited from a parent.
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Sickle-cell anemia is caused by a _____mutation
missense
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When placed in a hypertonic solution, what will happen to animal cells?
They will shrink
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What requires the action of DNA polymerase?
synthesis of a complimentary strand of DNA
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What does DNA do?
Transfers information form one generation to another in eukaryotes.
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What are centromeres?
The connect chromatids.
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What link adjacent epithellial cells that ine the lumen of body cavities such as the small intestine?
Tight junctions
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What is the process for bringing large particles into a cell?
phagocytosis
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When does DNA replication occur?
During S phase
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What is an example of post-transcriptional modification of mRNA?
adding a poly A tail to the 3' end
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What are characteristics of XP?
Deffective DNA repair and sensitivity to solar light.
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What removes a DNA sequence furing excicion repair?
endonuclease
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What transport goes from low concentration to high concentrations?
Active transport
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T/F DNA segments are encoded on the template strand that are identical to the mesage encoded on the complementary strand.
False
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What does DNA wrap around within the neucleosome?
Histones.
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Where does translation occur?
Cytoplasm
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Where does transcription occur?
Neucleus
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Frameshift mutations are a result of______
crossing over
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T/F Phosphorlaion of a structure alers its three dimentional structure
True
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During prokaryotic division, how di two chromosomes sperate?
attachment to sperate regions of the cell membrane
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CDK catalyzes the phosphorlation if targeted protiens which_________
changes the shape and function of targeted cells.
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How many neucleotides does a codon have?
3
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T/F Codons can code for multipe amino acids
False
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What is found in DNA?
C, O, N, H
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T/F a single gene can be transcribed by several RNA polymerases at once.
True
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What is a reason for redundancy in genetic code?
Silent mutations
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what is exocytosis?
When materials are packages and released into the ECF
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What phase does crossing over occur in?
Prophase 1
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What reads DNA stands?
RNA polymerase
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T/F the stop codon codes for an amino acid
False
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What causes genetic variances in haploid cells?
Crossover
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The presence of a _______sequence determines the DNA template used to synthesize a protein.
promoter
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