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Imagine a beaker with solutions separated by a plasma membrane (like what is shown in the figure, step 3). Predict what will happen after addition of a new solute to the solution on the left side if the new solute (1) crosses the membrane readily or (2) is incapable of crossing the membrane.
A. (1) New solute will diffuse from left to right to establish equilibrium; (2) water level on the right will not change.
B. (1) New solute will diffuse from left to right to establish equilibrium; (2) water level on the right will rise.
C. (1) New solute will diffuse from left to right to establish equilibrium; (2) water level on the right will fall.
D. (1) New solute will diffuse from right to left to establish equilibrium; (2) water level on the right will fall.
The condition "xeroderma pigmentosum" is characterized by high rates of skin cancers like malignant melanoma. It is caused by mutations in any of many genes that encode enzymes that participate in:
How is it that different cells can respond in different ways to exactly the same signaling molecule even when they have identical receptors?
Place the following characters on a phylogeny of fungi (with animals as an outgroup), Flagella, Multicellularity, Non-motile sperm, Arbuscular mycorrhizae, Macroscopic reproductive structures.
Select a specific gene and a specific alteration. Explain the effects of the modifications and why it might contribute to the cancer.
It has been established that incremental changes led to the development of a human eye. Closely examine the stages of development as seen in slide thirty-one of the Changes lecture.
A piece of DNA has unwound and the ends of the two strands have begun separating for replication. Describe, in full detail, the discontinuous synthesis of the lagging strand.
A 2-amino-purine can be incorporated into DNA in place of adenine. It can pair equally well with thymine or cytosine. What type of mutation do you expect it to cause.
A dye has an extinction coefficient of 5.5x10 Mcm at 350 nm. What is the concentration of an unknown solution of this dye if observed absorbance was to be 0.25 at 350 nm in a 1.5 cm cuvette?
Aphids can reproduce sexually and asexually. Females reproduce by themselves and give birth to live females in summer. Describe how the reproductive variability of aphids might be an adaptation that permits them to survive very aggressive predation.
Aspirin has a pH of three. Some people who take large amounts of aspirin (for example, for arthritis) take a pill that combines aspirin with Maalox. What is the reason for this combination.
What were the components of the pectoral girdle in early fishes and how has it changed in tetrapods? Specifically, what is the typical fate of the coracoids and clavicle in the tetrapod girdle?
find which of the following describes the type of the reaction(s) catalyzed: condensation (carbon-carbon bond formation); dehydration (loss of water); hydration (addition of water); decarboxylation (loss of CO2); oxidation-reduction; sutrate-level..
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