What is another term for a biological catalyst?
What will be an ideal response?
enzyme
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Which of the following is an appropriate interpretation for these graphs?
Maternal care (as measured by minutes crouching over offspring and proportion of pups retrieved) in female mice that have the fosB allele is
A. less than the maternal care given by female mice without the fosB allele.
B. greater than the maternal care given by female mice without the fosB allele.
C. the same as the maternal care given by female mice without the fosB allele.
D. less than the maternal care given by female mice without the fosB allele; however, the graphs depict only minor differences, which are most likely not significant.
E. not possible to determine from the data.
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 the relationship between maternal behavior and a particular allele? What other information is related to the question?
Choose Answer:
Given what you now know, what information is most likely to produce the correct answer?
Reflection 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?
The lab you work in has discovered a previously unidentified extracellular signal molecule called QGF, a 75,000-dalton protein. You add purified QGF to different types of cells to determine its effect on these cells
When you add QGF to heart muscle cells, you observe an increase in cell contraction. When you add it to fibroblasts, they undergo cell division. When you add it to nerve cells, they die. When you add it to glial cells, you do not see any effect on cell division or survival. Given these observations, which of the following statements is most likely to be true? (a) Because it acts on so many diverse cell types, QGF probably diffuses across the plasma membrane into the cytoplasm of these cells. (b) Glial cells do not have a receptor for QGF. (c) QGF activates different intracellular signaling pathways in heart muscle cells, fibroblasts, and nerve cells to produce the different responses observed. (d) Heart muscle cells, fibroblasts, and nerve cells must all have the same receptor for QGF.
Point mutations in the human genome that result in addition or deletion of a recognition site for a restriction endonuclease can most easily be detected by
A) RNAseq analysis. B) Northern blot analysis. C) Southern blot analysis. D) restriction fragment length polymorphism analysis. E) restriction fragment length polymorphism and Southern blot analysis.
Many insects must warm up before they fly in order to:
a. generate hemolymph. b. increase ATP synthesis. c. enhance gas exchange. d. elevate actin synthesis. e. diminish muscle rigidity.