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Q1. What is a double layered with molecules that have hydrophobic tails and hydrophilic head? It is found in all cells and it controls what enters and leaves the cell.
Q2. On the Pacific island of Guam, large herbivorous bats called "flying foxes" commonly feed on cycad seeds, a potent source of neurotoxins. The flying foxes do not visit male cones. As a result, what should be true?
Q3. When oxygen is unavailable, some cells use anaerobic (fermentation) pathways to make ATP. Another textbook says regarding fermentation: "The final steps serve only to regenerate NAD+." What does this statement mean? Describe using examples of specific fermentation pathways.
Research protist parasites in the Genus Giardia. Scientists have proposed that these organisms represent the "missing link" between prokaryotes and eukaryotes. Explain the cellular structure of Giardia and describe how the cells are alike to typical ..
How does the total number of replication origins in bacterial cells compare with the number of origins in human cells?
Why it is important for individuals to continue to move/contract lower-body musculature after intense lower-body exercise
Many flowering plants have co-evolved with their pollinators, while others have not. Give one advantage and one disadvantage for flowering plants that have generalists pollinators and flowering plants that have specialist pollinators.
Mycoplasmas are spherical with a diameter of 0.33um. D-glucose is present in the cell at a concentration of 1.0mM. Find the number of glucose molecules inside a single cell.
How may this capacity be an advantage to the cell.
Assume a migrating salmon moves from Alaskan waters past Cabo San Lucas into the Sea of Cortez, many miles south of San Diego.
Construct a hypothesis to explain the observation? From what you know about plants, if we were to place one of the test tube and beaker combinations in front of a green light, what would happen?
You are given 1 ml of a 50 mM stock solution of NADPH. You are told to dilute it so that its absorbance in the spec 20 equals 0.80. The molar extinction coefficient for NADPH is 6220 liters per mole cm and the path length is 5 cm. The volume of th..
Define point mutation and distinguish between substitutions, deletions and frame-shift mutations with examples.
Discuss the difference between muscle spasms ansmuscle spasticity. Including causes, signs ans symptoms, treatmentindications
A corporation has invented a new low-calorie sugar substitute. They wish to determine if the substitute might be carcinogenic, so they use it in the Ames test with Salmonella his mutants.
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