Exam 1 mult choice Flashcards
Which of the statements about viruses is not true?
all are true: viruses can use DNA or RNA, dependent on host cells, are much simpler than cells
The second law of thermodynamics states that
spontaneous processes are characterized by the overall conversion of order to disorder.
For a reaction with ^H = 23kJ/mol and ^S = 22J/k*mol, at 2C, The reaction is:
non-spontaneous = +16,950
What functional groups can NOT Hydrogen bond with water?
alkene
Which of the following is most soluble in water?
1,3-dihydroxylbutane - has the most polar functional groups.
Which of the following statements about buffers is true?
When pH = pKa, the weak acid and its conjugate base concentrations in a buffer are equal.
Which of the following tripeptides would be expected to be the most hydrophobic:
GYA
The ________ character of most standard amino acids causes solutions of amino acids to rotate plane polarized light.
chiral
all amino acids derived from proteins have the same isomer conformation as
L-glyceraldehyde
Nucleosides contain
none of the above… look up.
In a large part, Watson and Crick’s proposal of a double-helical structure for DNA was based on evidence from:
x-ray crystallography
In living cells, nucleotides and their derivatives can serve as
all of the above: carriers of metabolic energy, enzyme cofactors, intracellular signals, precursors for nucleic acid synthesis
Replication is part of the central dogma of molecular biology and _________
describes the process by which DNA is used to copy itself.
common differences between DNA and RNA include _______.
single stranded RNA vs double stranded DNA, the presence of uracil or thymine
Deoxyribose
regular DNA lacks a hydroxyl group on the 2’ carbon of the ribose.
