To control microbial growth in a food, one can decrease water availability by the addition of ________.
A. agar
B. gelatin
C. sugar or salt
D. formaldehyde
Answer: C
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In ________, the ribosomes can attach to the mRNA and begin translation even though transcription has not been completed.
A. archaea B. fungi C. eukaryotes D. prokaryotes
A deletion in an operon removes the promoter. How will that affect the transcript that is produced from the operon?
A. The transcript will be produced and normal in length B. The transcript will be produced, but shorter than normal C. The transcript will be produced, but longer than normal D. The transcript will produced, but will contain a deletion E. The transcript will not be produced
Which situation demonstrates only the genetic influence on a trait?
A) Hair dye turns Angela's brown hair to red. B) Sandy's hair becomes blonder when she spends time out in the sun. C) Jen has brown hair, just like her mother and father. D) Identical twins Kiera and Tanya have different colored hair.
Watching salt crystals form as ocean water evaporates, a student says, "Lookâmore and more crystals are appearing. The ocean water is alive!" Which statement is an accurate evaluation of the student's remark?
A) The student is correct: Crystals are ordered structures and they are reproducing, so the ocean water is alive. B) The student is correct because crystals are formed by processing energy from the sun to create new structures, so ocean water is alive. C) The student is incorrect because the solution is processing energy from the sun rather than gaining energy from other organisms, so the ocean water is not alive. D) The student is incorrect because all of the crystals reproduce the same kind of crystals with no variation to provide adaptation, so the ocean water is not alive.