Marine mammals produce uric acid that is less concentrated than seawater
Indicate whether the statement is true or false.
ANS: F, urine, more
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Which of the following reactions would you predict could be coupled to ATP synthesis from ADP + Pi? Choose all that apply
A. creatine phosphate + H2O creatine + Pi, G -10.3 kcal/mol B. phosphoenolpyruvate + H2O Pyruvate + Pi, G -14.8 kcal/mol C. glucose 6-phosphate + H2O glucose + Pi, G -3.3 kcal/mol D. glucose 1-phosphate + H2O glucose + Pi, G -5.0 kcal/mol E. glutamic acid + NH3 glutamine, G +3.4 kcal/mol
Vasopressin is a hormone that is primarily released when the body is low on water. Release of vasopressin causes the kidneys to conserve water by concentrating urine and decreasing urine output. However, vasopressin also has additional functions in other tissues such as the brain and blood vessels, which are not directly involved in urine production. How could it be possible for vasopressin to
trigger different responses in different tissues? A. Vasopressin can bind to, and act on, different receptor subtypes, leading to different cellular responses in different tissues. B. Vasopressin can be released at different times to result in different effects. C. Vasopressin binds to the same exact receptor in different tissues, but causes a different conformational change to the receptor in each tissue. D. The kidneys have a receptor for vasopressin, but cells in the brain and blood vessels do not have a receptor for vasopressin.
How do mutations help us in understanding the particular functions of a gene?
What will be an ideal response?
Which of the following are true statements about the carbon cycle? Check all that apply.
A. Carbon cycles locally. B. Burning of gasoline is a contributor to the current imbalance in the carbon cycle. C. Replacing rainforest with farms decreases atmospheric CO2 levels. D. In water, inorganic carbon exists in two different forms, both of which can be used by autotrophs. E. Carbon and nitrogen fixation are both facilitated by microbes.