What would the answers to these two Biochemistry questions?

Posted on 1970-01-01 00:00:00 in Biology by SYNOS

1. Organisms can usually withstand temperatures only a few degrees lower than their optimal temperature. When this low temperature is exceeded which of the following begins to happen? 
a. The energy of activation necessary for reactions to proceed cannot be achieved 
b. The hydrogen bonds of enzymes break causing denaturation and loss of enzyme function. 
c. Enzymatic reactions accelerate and metabolism can no longer be controlled. 
d. The covalent bonds of proteins break down causing denaturation and loss of protein function 
e. Membrane integrity is lost as the covalent bonds in phospholipids break down. 

2) 39. If you were to grow a green plant in a lighted chamber in the presence of radioactive carbon dioxide for several days, which of the following types of compounds in the plant would be radioactive first? 
a. Only sugars 
b. Amino acids and proteins 
c. Oils and membrane lipids 
d. Calvin cycle intermediates 
e. All of the above

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