A protein is tightly associated with the plasma membrane and it can be isolated by treating the membrane with a strong detergent. What type of membrane protein is this?
A. either an integral or a peripheral membrane protein
B. a peripheral membrane protein
C. neither an integral nor a peripheral membrane protein
D. an integral membrane protein
Answer: A
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What is the definition of a species cluster?
a. a group of closely related species with a common ancestor b. a group of species that developed host races c. a group of species that exhibit polyploidy d. a group of totally unrelated species living in a common habitat e. when allopatric and parapatric speciation occur together
Referring to the above diagram of the brain, A
identifies which lobe of the cerebrum?
a. frontal lobe b. parietal lobe c. occipital lobe d. temporal lobe e. primary motor cortex
If a cell is no longer able to differentiate into any type of tissue, it has become _______
Fill in the blank(s) with correct word
Which one of the following is not among the four most abundant elements in living organisms?
A) Carbon B) Hydrogen C) Nitrogen D) Oxygen E) Phosphorus