Why can a person who is unable to produce insulin be successfully treated with insulin derived from genetically modified bacteria?
A) Typical bacterial insulin is exactly the same as human insulin.
B) The gene that produces insulin in humans was inserted into the bacteria where it continues to produce human insulin.
C) The insulin-producing gene of bacteria was altered to have the same base sequence as the human counterpart and now produces the human version of insulin.
D) Bacterial insulin is similar enough to human insulin to serve the same purpose.
B
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The two basic structural forms taken by most viruses are ____
a. polyhedral or enveloped b. helical or enveloped c. helical or polyhedral d. cylindrical or polyhedral e. cylindrical or enveloped
In sponges, the choanocytes or collar cells
a. are found scattered throughout the sponge body. b. act in obtaining food for the sponge. c. allow exit of water from the sponge. d. produce spicules made of silica or calcium carbonate. e. give rise to gametes.
Countries expected to show the most population
growth in decreasing order are a. China > India > Pakistan > Nigeria > Bangladesh > Indonesia. b. China > Pakistan > India > Nigeria > Bangladesh > Indonesia. c. India > China > Pakistan > Nigeria > Bangladesh > Indonesia. d. India > China > Pakistan > Bangladesh > Nigeria > Indonesia. e. India > China > Pakistan > Bangladesh > Indonesia > Nigeria.
What route is being followed by water that moves through nonliving regions of a root, such as air spaces in root tissue?
a. the apoplastic, transmembrane, and epidermal pathways b. the symplastic, transmembrane, and transepidermal pathways c. the transmembrane, epidermal, and transepidermal pathways d. the apoplastic, transmembrane, and symplastic pathways