Answer Options:
Phosphatidyl serine
Triacylglycerol
Palmitic acid
Glycerol
Cholesterol
Answer: Glycerol
Question: Which of the following factors is responsible for the fact that water is a liquid at room temperature?
Answer Options:
Covalent O-H bonds
ionic bonds
hydrogen bonds
Hydrophobic bonding between water molecules
The molecular weight of water
Answer: hydrogen bonds
Question: Other than solubility of sample in the solvent, what is the criteria for the solvent [other than cheap and nontoxic] used for preparing the sample that impacts the experiment?
Answer: The solvent volume is not too big to ensure the spot of the sample is [small].
Question: What is the purpose of having very small bores on the spotters?
Answer: So the solvent samples are dissolved in it evaporate quickly.
So very viscous samples can be taken up by the spotter.
Question: Which of the following is not an example of a macromolecule?
Answer Options:
A Chromoprotein
A Protein
A Polysaccharide
An Enzyme
An Amino acid
Answer: An Amino acid
Question: In eukaryotes, the nucleus is enclosed by a double membrane called the: cell membrane nuclear envelope nucleolus nucleoprotein nucleosome
Answer: nuclear envelope
Question: What should you do if your clothing catches fire?
Answer: Roll on the floor until the flame is gone or go to the safety shower and shower.
Question: What is a common role of a coenzyme in a reaction as stated in class?
Answer Options:
To lower the activation energy of a reaction further
The donation of atoms to a reaction
To alter the enzyme’s shape
To assist the substrate by binding to the enzyme, enabling substrate to active site engagement
Answer: The donation of atoms to a reaction
Question: Which of the following is required for the conversion of UDP-glucose to glycogen?
Answer Options:
Glycogen synthase
Branching enzyme
Glycogen phosphorylase
Debranching enzyme
Answer: Both A and B are correct
Question: The analysis of a diversity of exoplanets has prompted astronomers to update their planetary formation model to include planetary migration. Which of the following are true concerning planetary migration? [More than one]
Answer Options:
Planetary migration is the best explanation of how systems with hot Jupiters may have formed.
Planetary migration is the aspect of planetary formation where a planet’s orbit may change to allow it to move closer or farther from its star.
Planetary migration proposes that Uranus and Neptune formed near the current locations of Jupiter and Saturn, but they moved out to their present locations through gravitational interactions with other planets.
Planetary migration is a proposed research program to search for Earth-like planets in the habitable zone around exoplanets with the express purpose of sending humans for future exploration.
Answer: Planetary migration is the best explanation of how systems with hot Jupiters may have formed.
Planetary migration is the aspect of planetary formation where a planet’s orbit may change to allow it to move closer or farther from its star.
Question: Determine the pH for the following solution of acetic acid containing [0.022] A- and [0.11] HA. The pKa of acetic acid is 4.76.
Answer Options:
4.10
4.76
4.30
5.10
5.24
Answer: 5.24
Question: What reason did the author suggest for omeprazole having a higher pKa than androstenodione when binding compared to androstenedione?
Answer Options:
The Km was different between them
There were additional hydrophobic contacts made
The Km and Kd were different between them
Their Kcat were different
None of the above
Answer: There were additional hydrophobic contacts made
Question: Which of the following groups of molecules can participate in a hydrogen bond as a hydrogen bond donor?
Answer Options:
NH3+
CH3
C=O
C≡N+
Answer: NH3+
Question: Which of the following statements is not true of the lysosome?
Answer Options:
It functions in intracellular digestion.
It is capable of digesting most macromolecules.
It is involved in the packaging and secretion of cell products.
It is involved in pathological conditions such as gout and rheumatoid arthritis.
Answer: It is involved in the packaging and secretion of cell products.
Question: The four most abundant chemical elements in living systems are:
Answer Options:
Hydrogen, carbon, nitrogen and oxygen.
Sodium, potassium, nitrogen and sulfur.
Hydrogen, oxygen, sulfur and phosphorus.
Answer: Hydrogen, carbon, nitrogen and oxygen.
Question: Which of the following is not a basic element of life?
Answer Options:
Phosphorus
Hydrogen
Nitrogen
Oxygen
All of the above are basic elements of life
Answer: All of the above are basic elements of life
Question: Local folding of a protein occurs at what defined level of protein folding?
Answer Options:
Primary
Secondary
Tertiary
Quaternary
All of the above
Answer: Tertiary
Question: Glycogen is:
Answer Options:
Main energy storage molecule of animals
Main carbohydrate reserve of animals
Main carbohydrate found in seeds
A form of plant starch
Answer: Both A and B are correct