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What mechanism is employed by eukaryotic cells to keep their chromosomes from replicating more than once per cycle?
What is the current model for how Polymerase III a selections deoxynucleotides and rejects ribonucleotides during polymerization? what experiments could you do to test the model?
Question 1: Which amino acid residues are involved in sugar selection? Question 2: The phosphate between which 2 phosphates is cleaved during catalysis?
Explain how the process of menstruation occurs in the female. Include in your discussion an overview of the hormones, LH, FSH, estrogen and progesterone, and how the menstrual cycle and ovulation cy
Briefly describe the key attributes of the three types of non-covalent bonds. How are intermolecular interactions compared? Why are weak non-covalent forces important in molecular recognition? Why a
Why do some lipids form lipid bilayers, whereas others form micelles? what major component in the cell membrane favors the formation of a lipid bilayer?
Define action potential and explain its mechanism in terms of the transient changes in Na+ and K+ permeability of the plasma membrane of a neuron. How does this action potential lead to neurotransmi
Polyubiquitilation via K48 linkage is a signal for a) DNA repair b) endocytosis c) exocytosis d) proteosomal degradation
Non-competitive inhibition of an enzyme can involve allosteric mechanisms. a) True b) False
A protein domain: a) cannot have beta sheets. b) can fold only in the presence of the rest of the protein. c) is always composed of multiple peptides. d) can be disordered.
When this organelle's ability to perform its normal function is impaired, the cell would have a problem that could be called "cellular indigestion". What is this organelle?
Question 1: What are the principles of the Endocrine system? Explain thoroughly.
Which of the following is NOT a part of the endomembrane system? a) Plasma membrane b) Peroxisome c) Transport vesicle d) Smooth ER e) Golgi apparatus f) Rough ER
Question 1: What are polyalcohols? Give me a few exmples of some.
What two domains are present in eukaryotic transcriptional activators? What is the function of each of these domains? Which of these domains determines what genes a transcriptional activator will re
What is the role of the c-terminal domain of RNA pol II in co-transcriptional modification of pol II transcripts? How is protein phosphorylation involved?
Primary generalized osteoarthritis (PGO) is caused by an autosomal gene that acts as a dominant in females and a recessive in males. If an unaffected man (whose father had the disease) marries an af
Which of the following factors determines an enzyme's specificity? A.The three-dimensional shape of the active site B.The type of cofactor required for the enzyme to be active C.The Michaelis constant
The growth rate of potential pathogens has important implications for food safety If salmonella has a generation time of 1 hr on the surface of thawed poultry how much will the concentration of
Quetion 1: how to sterilize tissue taken from patients? Question 2: Why are transport vesicles needed to transport materials from the inside of the endoplasmic reticulum to the inside of the Golgi
Question 1: Compare and contrast the three types of ATP phosphorylation. Question 2: What do you predict would happen to the shape of the growth curve if you were to subculture Vibrio growing in log
The vast majority of drugs work on which typ of cell recetor? A.Enzyme-coupled receptors B.G-protein coupled receptors C.Sodium/Potassium Pump D.Ion-channel coupled recetpors
Which protein produced by the body has a Y-shaped conformation? A.Antibodies B.Alpha helix C.Chaperones D.Enzymes
Which is influenced most during a slow signaling cascade? A.Enzyme activity B.Translation C.Protein degredation D.Transciption E.Quaternary Structure F.B and D G.D and E
Write down the equation for the dynamics of gene identify (G) for a model that includes both the Wright-Fisher model for genetic drift and the infinite-alleles model for mutation. Then provide the a