Answer Options:
Provides support
Is present only in eukaryotes
Controls the flow of substances in and out of the cell
Is present only in prokaryotes
Both A and C are correct.
Answer: Controls the flow of substances in and out of the cell
Question: Let’s consider that ethyl acetate is the ideal solvent for this TLC experiment. What might have happened to the spots if you had used acetone as the eluent instead of ethyl acetate. Spots move towards top of TLC plate because:
Answer: Acetone more polar, overcomes attractions of sample to adsorbent better.
Question: Glycogenetics return from the constant triage of carbohydrates to proteins & ________.
Answer Options:
Amino acids
Lipids
Nucleotides
Answer: Both A and B are correct
Question: a) Why, specifically, is the brow bar feature of chemical splash goggles critical for adequate splash protection? It protects from above the eyes. b) Where should chemicals that can be irritating to one’s respiratory system be stored long term?
Answer: a) In a fume hood.
Question: Which of the following statements is not true of the mitochondrial matrix?
Answer Options:
It contains the same DNA as your paternal progenitor.
It contains circular DNA molecules.
It contains all of the necessary components in the matrix for protein synthesis.
It has a gel-like consistency.
It has a high concentration of enzymes and ions.
Answer: It contains the same DNA as your paternal progenitor.
Question: The ΔG of a reaction:
Answer Options:
will change if the temperature of the reaction is changed
will change if the concentration of reactants and products are changed
can be used to calculate whether a reaction is thermodynamically favorable under defined non-standard conditions.
the value alone can directly predict whether a reaction will be thermodynamically favorable under standard conditions.
is not related to the equilibrium constant.
Answer: can be used to calculate whether a reaction is thermodynamically favorable under defined non-standard conditions.
Question: Cellulose is indigestible to most animals because:
Answer Options:
Cellulose is not soluble in water.
Animals lack the enzymes required to hydrolyze the β links of the cellulose.
Cellulose has too few axial hydroxyls and therefore cannot be digested.
Both A and B are correct.
Answer: Both A and B are correct
Question: What is the name of the region around a star where an orbiting planet would have a surface temperature capable of sustaining water in the liquid state?
Answer Options:
The habitable zone
The green area
The H2O Ozone
Answer: The habitable zone
Question: Salt bridges in proteins are an example of __________.
Answer Options:
hydrogen bonds
ionic interactions
hydrophobic interactions
van der Waals forces
London dispersion forces
Answer: ionic interactions
Question: Determine the ratio of conjugate base over acid, [A-]/[HA], with a pKa of 6.0 in a solution of pH 5.5.
Answer Options:
1.36
0.136
3.14
0.0316
3.160
Answer: 0.1