GRE Subject Test - Biology

Practice questions for  the GRE biology subject test.

51 cards   |   Total Attempts: 188
  

Cards In This Set

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What are the major elements in proteins?
Carbon, hydrogen, nitrogen, oxygen, and sulfur
What are the major elements in nucleic acids?
Carbon, hydrogen, nitrogen, oxygen, phosphorous
What are the major functional categories of proteins?
Enzymes, transport, storage, membranes, movement, signaling (incl. antibodies and neurotransmitters), and connective tissue.
What type of reaction occurs when two amino acids attach? What is the byproduct?
Dehydration synthesis; water.
What is the general chemical formula of all fatty acids?
CH3(CH2)nCOOH where n is an even number between 12 and 24.
What are glycerides? What are they made of?
They are esters composed of glycerol (CH 2 (OH)CH(OH)CH 2 (OH)) plus three fatty acid chains.
What is emulsification (in regard to phospholipids)?
Basically, how detergents work; amphipathic (hydrophobic + hydrophilic) lipids surround a fat droplet and break it in to smaller particles.
What lipid steroid is commonly found in cell membranes?
Cholesterol
What are the main structural constituents of a steroid?
Three fused six-membered rings and one five-membered ring.
What kind of bonds join carbohydrates? What are the two types?
Glycosidic bonds, which bridge from one sugar to another with an oxygen in between.
Alpha linkage = kinks (ex. glycogen and starch)Wh
Beta linkage = straight chain (ex: cellulose)
What are the three main structural components of nucleic acids?
A 2-or-3-ring nitrogenous base, a sugar, and a phosphate group.
What is the net reaction of glycolysis?
Glucose + 2ADP + 2Pi + 2NAD+ ----> 2Pyruvate + 2ATP + 2NADH + 2H+ + 2H2O
What are the three ways pyruvate can be reduced under anaerobic conditions?
Fermentation, alcohol fermentation, and lactic acid fermentation.
What is the net gain of ATP in each of the three main stages of eukaryotic ATP production?
+6 from glycolysis, +6 from pyruvate decarboxylation, +24 from the citric acid cycle.

Total: +36
What is the overall net reaction of photosynthesis?
6CO2 + 12H2O + light ---> C6H12O6 + 6O2 + 6H2O