What is the process that turns on the transcription of a gene or genes?

A. induction
B. repression
C. translation
D. replication


Ans: A. induction

Biology & Microbiology

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Oxygen levels in the photic zone fluctuate over the course of a 24-hr period. If you were measuring dissolved oxygen over the course of the day, when would you expect to see the lowest levels of oxygen and why?  

A.  Mid-morning -- because fish are most active and their respiration rates are highest. B.  Early afternoon -- when the surface water warms up and sinks to the bottom. C.  Mid-afternoon -- because the activity of the Calvin cycle (the dark reactions) of photosynthesis are at their peak. D.  Early evening -- when animals come to feed and disturb the surface waters. E.  During the night -- because the light reactions of photosynthesis are inactive. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required?   Gather Content · What do you already know about oxygen levels?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

You observe two groups of frogs that are closely related. Males from each group "sing" with a species-specific song to attract a female frog. Females only respond to songs sung by males of their species

This is an example of ______-zygotic reproductive isolation between two species. A. pre B. post

Biology & Microbiology

Which of the following is true for ALL exergonic reactions?

A. The products have more total energy than the reactants. B. The reaction proceeds with a net release of free energy. C. Some reactants will be converted to products. D. A net input of energy from the surroundings is required for the reactions to proceed. E. The reactions are nonspontaneous.

Biology & Microbiology

In a woman’s monthly cycle, the hormone _____ is released when estrogen reaches a peak

a. luteinizing hormone b. oxytocin c. progesterone d. testosterone e. human chorionic gonadotrophin

Biology & Microbiology