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biochem test 2
Terms in this set (34)
what is a function of vitamin k?
regulation of blood clotting
disulfide bonds within a single protein chain are examples of
the protein hemoglobin has two alpha chains and two beta chains linked together. what is the highest level of protein structure present in hemoglobin?
what is the net charge of lysine at pH 7?
What is the net charge of the peptide Glu-Lys (Glutamic Acid Lysine) at pH 7?
Which of the following is true about reindeer?
the membranes of the internal organs of a reindeer have more saturated fatty acids than the membranes of the lower legs(walking in snow)
classify the following lipid
multiple isoprene or Y structures
increased dietary consumption of omega 3 fatty acids leads to
decreased synthesis of prostaglandins that contribute to inflammation
which of the following amino acids contains a polar side chain?
which amino acid has two chiral carbons
which of the following amino acids is aromatic?
a patient that is on coumadin/warfarin therapy suddenly increases their dietary intake of green leafy vegetables, including spinach and kale. what effect would this have?
prothrombin would become more negative
what is true about hemoglobin?
hemoglobin exhibits greater cooperativity for oxygen binding than myoglobin
which of the following amino acid substitutions would be expected to lead to sickling of red blood cells under low oxygen concentrations?
replacement of Glutamic Acid at position-6 of the Beta chain of hemoglobin A by Leucine.
which form of vitamin D is most active
an amphipathic molecule contains:
contains both polar and non polar regions
which of the following bonds stabilize the helical structure of an alpha helix?
hydrogen bonding of the carbonyl oxygen and amide hydrogens between peptide bonds.
how is a ceramide formed?
by joining a fatty acid in amide linkage to a sphingosine
how is a sphingomyelin formed?
it is a phosphocholine linked to a ceramide
what 5 carbon unit is the building blocks of all terpenes?
lipids are generally soluble in _____ solvents
what does an amphipahic mean in regards to lipids
having both polar and nonpolar regions
saturated fatty acids
no double bonds between carbons in the chain
one double bond between carbons in the alykyl chain
more than one double bond in the alkyl chain
fatty acids with cis double bonds are ___ (linear or bent?) and have _____ melting points.
unsaturated fatty acids with trans double bonds are more (linear/bent) and have (higher/lower) melting points than those with cis bonds.
hydrogention (increases/decreases) the melting point of oil.
increases, because it converts veb cis double bonds to single bonds which have higher melting points
why do some desert plants have wax on their surfaces?
to keep them from drying out.
does vitamin k contain isoprene units?
is vitamin k derived from terpenes?
which amino acid does not contain a primary amine?
which amino acids are positive
arginine, lysine, and histidine
which amino acids are negative
aspartic acid and glutamic acid
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