Which of the following are not likely to be found in a biological molecule: Oxygen, Hydrogen, Carbon, Helium, Potassium
Helium
100
What is the structure of the a DNA molecule.
Helical, double stranded, and anti-parallel.
100
In the presence of oxygen, in which organelle is the majority of ATP synthesized?
Mitochondria
100
Which of the following phases of the cell cycle is not part of interphase?
-M
-S
-G1
-G2
-All of the above
M - metaphase
100
Prokaryotic cells do not have...
Nucleus or Mitochondria or any other membrane bound organelles
200
The type of bond formed when oppositely charged ions, such as Na+ and Cl- are attracted to each other is...
Ionic Bond
200
If a double-stranded DNA molecule contains 22% C, it must contain ___% A.
28% A
200
In the absence of oxygen, glucose is converted to lactate. The net production of ATP in glucose is ___ molecules.
2
200
How many genetically identical nuclei cells are formed in mitosis.
2
200
Mitochondria have...
An inner and outer membrane
300
A low pH (two or less) means that:
-there is a high oxygen concentration
-the solution is basic
-there are many hydrogen ions in solution
-there are very few hydrogen bonds
-there are few hydrogen ions in solution
There are many hydrogen ions in solution
300
The anti-parallel relationship of the two strands of DNA refers to...
The alignment of the strands such that one strand starts with a 3' carbon and the other starts with a 5' carbon.
300
A glycosidic linkage is analogous to what bond?
Phosphodiester bond
300
Mitotic promoting factor contains a pair of biochemicals called ____ and ____.
CDK (Cyclin Dependent Kinase) and Cyclin
300
In eukaryotic cells transcription occurs in the ____ while translation occurs on the ____ that are located in the ____.
Nucleus, Ribosome, Cytosol
400
What characteristic of water contributes to the relatively constant temperatures of the ocean?
It takes a large amount of heat energy to raise the temperature of water (high specific heat).
400
At the end of the DNA replication, two DNA molecules are produced, each one consisting of a parental DNA strand and a new DNA strand. This process is known as...
Semiconservative replication
400
In the absence of oxygen, certain forms of yeast can produce alcohol from pyruvate. What else occurs in this reaction?
NADH reoxidized to produce NAD+
400
A key step in passing through the G1 checkpoint is...
Phosphorylation of RB by a cyclin dependent kinase.
400
What molecules are most permeable through the lipid bilayer?
Small, hydrophobic molecules.
500
What is meant by the term valence electrons? For example, Oxygen has atomic number of 8. How many valence electrons does it have?
Valence electron is an electron in the outer shell of an atom which can combine with other atoms to form molecules. Oxygen has 6 valence electrons.
500
What are the seven steps to DNA synthesis? Define each one for extra points! ;)
1) Helicase:
2) Single stranded binding proteins
3) Topoisome
4) RNA primase
5) DNA polymerase III
6) DNA polymerase I
7) Ligase
500
Which of the following is/are true of respiratory chain:
-Electrons are received from NADH and FADH2
-Electrons are passed from donor to recipient carrier molecules in a series of oxidation reduction reactions
-The terminal electron acceptor is oxygen.
-The enzymes are located in the inner mitochondrial membrane.
-All of the above
All of the above.
500
What are the steps to mitosis and what happens in each step?
1) Prophase: Spindle fibers are visible and nuclear envelope disappears.
2) Metaphase: Chromosomes line up in the middle.
3) Anaphase: Spindle fibers begin to pull apart chromosomes and move to opposite poles.
4) Telophase: Cleavage furrow and nuclear envelope returns.
5) Cytokinesis: Two identical daughter cells.
500
Which of the following would spontaneously form bilayers in an aqueous environment?
-Fatty acids
-Phospholipids
-Triacylglycerides
-DNA
-All of the above