A transposable element composed of an antibiotic resistance gene, a recombinase gene, and inverted repeats is identified in a bacterial genome. This element can be any of the following except
A. an integrated conjugative element.
B. a composite transposon.
C. an insertion sequence.
D. a unit transposon.
Answer: C
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In humans, the sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that are homozygous for the sickle-cell allele. A man and woman each carry the trait, but do not have sickle-cell disease. What is the probability that their first two children will both have sickle-cell disease?
A. 1/16 B. 1/8 C. 1/4 D. 3/8 E. 1/2 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about monohybrid crosses? About determining the probability of two independent events? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
Answer the following statements true (T) or false (F)
1. A consequence of the tendency of the human to gain excess weight is an increased risk of developing high blood pressure, diabetes, cancer, and heart disease. 2. During hibernation, a bear would be expected to be in the postabsorptive state in terms of nutrient utilization. 3. Triglycerides do not need to be chemically altered or broken down to cross the intestinal epithelium. 4. Animals have the ability to generate glucose from proteins during prolonged postabsorptive states.
In an ecosystem, the amount of organic matter produced in a given time that is available for heterotrophs is known as
A. daily yield. B. gross primary productivity. C. net primary productivity. D. effective vitality. E. net yield.
The protein opsin and the molecule retinal combine to form the pigment found in rods called _________
Fill in the blank(s) with correct word