Science can, or can attempt to, answer all of the following questions except _____.
A) why the parrotfish is green
B) how the cheetah became such a swift predator
C) the purpose for human life
D) how the carbon atom is constructed
E) if smoking harms a person's health
Answer: C) the purpose for human life
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Birds and reptiles save water by eliminating __________ rich wastes as uric acid crystals. Fill in the blank(s) with the appropriate word(s)
Which of the following is true about glycosylated plasma membrane proteins?
A) Carbohydrate is added only after the protein is in the plasma membrane. B) The carbohydrate usually is one sugar and rarely more than 5 sugars long. C) Only one specific site is glycosylated on each protein. D) N-linked carbohydrates are linked to hydroxyl groups in protein R groups. E) The carbohydrates can be detected experimentally with ferretin-linked lectins.
A polysome is ____
a. one of the units of a ribosome b. the nuclear organelle that synthesizes RNA c. an organelle that functions similarly to a ribosome during meiosis d. the two units of a ribosome considered together e. an mRNA molecule with several ribosomes attached
Assuming that an amino acid sequence is 250 amino acids long, how many different molecules, each with a unique sequence, could be formed?
What will be an ideal response?