DNA codes for the sequence of amino acids in the primary structure of a protein, but not for sugars or lipids. This is because
What will be an ideal response?
proteins are the main structural and functional components of cells.
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The problem with plastic garbage is that it ________
a. can go from storm drains to the sea only b. can harm birds and mammals when consumed only c. can last for hundreds of years in the ecosystem only d. all of the choices
Darwin developed his theory of natural selection despite having an incomplete and/or inaccurate knowledge base from which to work. Which of the following were problems for Darwin?
A) the source of variations in populations B) an understanding of inheritance patterns from one generation to the next C) The accepted age of the Earth was far too young to allow for the gradual changes Darwin envisioned. D) All of the above.
Living cells have an intact phospholipid bilayer that separates the cell from its external environment; this structure is commonly referred to as the
a. nucleus. b. mitochondria. c. endoplasmic reticulum. d. plasma membrane.
If a drug interferes with the activities of transfer RNA, which one of the following is likely to occur?
A. DNA will not be able to make copies of itself. B. Proteins will not be produced. C. Mutations will occur to the DNA. D. Messenger RNA will not be manufactured.