The muscular digestive organ of birds in which food is ground into small bits is the
a. lumen
b. gizzard
c. crop
d. stomach
e. cloaca
b
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Use the following graph to answer the following question(s).
Regardless of the amount of fat contained in cookies, the most common cell size in a cookie was ________.
A. between 1,000 and 15,000 ?m B. very large (larger than 1,500 ?m) C. very small (smaller than 100 ?m) D. between 280 and 500 ?m
The fluid mosaic model of cell membrane structure describes a membrane with phospholipids that ________ and proteins that ________
a. can drift laterally / may either be fixed or capable of drifting b. are permeable to water-soluble molecules / spontaneously assemble into two layers c. are fixed in place / can drift laterally d. can drift laterally / are fixed in place
Suppose the lacI repressor gene were permanently silenced by an alteration to the DNA sequence
What would be the impact on the expression of the lac operon?
a. The lac operon would be transcribed but at a low level. b. The lac operon would be transcribed at a high level. c. There would be no real impact on lac operon expression. d. The lac operon would only be expressed when lactose was present. e. The lac operon would not be expressed even when lactose was present.
Assuming one glucose molecule being metabolized, what is the net yield of ATP in the cell under anaerobic
conditions? a. 1 b. 2 c. 32 d. 34 e. 36