A form of diffusion in which the molecules pass through a protein instead of between the phospholipids is called ________
A) diffusion
B) facilitated diffusion
C) active transport
D) osmosis
Answer: B
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In Drosophila melanogaster, the gene for eye color is located on the X chromosome. The allele for red eye color
(Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a single genetic cross. You find both red-eyed females and white-eyed females as well as both red-eyed males and whiteeyed males. The genotypes of the parents were ____.
a. Xw+Xw+; XwY b. Xw+Xw; XwY c. XwXw; Xw+Y d. Xw+Xw; Xw+Y e. XwXw; XwY
In mice, the allele for black fur is dominant to the allele for brown fur. If a male heterozygous black mouse is crossed with a female brown mouse, what percentage of the F1 offspring do you predict will be homozygous? ( Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5 )
What will be an ideal response? 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 crosses and genotype ratios? 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?
When elemental sulfur is provided externally as an electron donor, the organism must attach itself to the sulfur particle because of the extreme insolubility of elemental sulfur
Indicate whether the statement is true or false.
Before messenger RNA is mature,
a. all exons are deleted and removed. b. a cap and a tail are provided. c. anticodons are assembled. d. the transfer RNA transfers the messenger RNA to the ribosome. e. the single RNA strand duplicates itself in much the same way as DNA.