In colder weather, a bird’s cells would need to __________________ in order to maintain membrane fluidity Increase incorporation of unsaturated fatty acids Decrease incorporation of unsaturated fatty acids Increase the proportion of double bonds in the membrane lipids Decrease the proportion of double bonds in the membrane lipids Increase the activity of desaturases

In the diagram below, there is at least one example of a first messenger one example of a second messenger and one example of an effector.  These examples include a first messenger like ____________, a second messenger like __________ and an effector like __________.   

How many H+ will be pumped and how many ATP molecules will be produced if 4 molecules of FADH2 and 4 molecules of NADH donated their high-energy electrons to the mitochondrial electron transport chain?  

Cholera toxin exerts its effect on epithelial cells in the intestinal lumen by:  

How many high energy compounds are produced when 3 pyruvates enter the krebs cycle?  

In the situation shown below,

A certain grade of diesel fuel has an energy density of 43.1 MJ/kg and a mass density of 850 kg/m3. If this fuel is used to feed an electrical generator with an output of 275 kW and an overall efficiency of 33.5%, how many gallons should the fuel tank contain in order to run the generator for 2 continuous weeks? 

A 7.37 kg block is given an initial velocity of 5.35 m/s up a slope inclined at 13.7° to the horizontal. If the coefficient of kinetic friction between the block and the inclined plane is 0.237 and the coefficient of static friction is 0.317, calculate how far the block slides up the slope before it stops.

Solve.The population of a particular country was 26 million in 1980; in 1993, it was 31 million. The exponential growth function describes the population of this country t years after 1980. Use the fact that 13 years after 1980 the population increased by 5 million to find k to three decimal places.

Find the zeros of the polynomial function.f(x) = x3 + 6×2 – x – 6