hana s

Biochem hw help please!?

which one of the following is the right answer according to induced fit theory?

a) Ligands stabilize specific preexisting conformations of their receptors.

b) Receptors undergo conformational changes upon the binding of ligands

c) The binding of ligands does not affect the conformation of their receptors.

5\'–AUCGGACGAAAGCGCU–3\'

Select all possible amino acid sequences. There will be more than one answer.

a. Ser-Arg-Lys-Gln-Ala

b. Arg-Lys-Arg-Gly-Ile

c. Ile-Gly-Arg-Lys-Arg

d. Arg-Thr-Lys-Ala

e. Ser-Asp-Glu-Ser-Ala

I know that there are three answers but which three I am not sure plzz help!

find pKa for acid? answer in scientific notation

Find the pKa for the acid? answer in scientific notation!

C means NOT M

reaction

For a single slit diffraction pattern, describe what happens to the pattern of the laser as the aperture (i.e.

slit width) a gets larger. For the double slit diffraction pattern, what “part” of the grating is

responsible for the envelope of the diffraction pattern? What, then, is responsible for the more

defined peaks within the envelope of the double-slit diffraction pattern?

I have no idea how to go about this question???

For a single slit diffraction pattern, describe what happens to the pattern of the laser as the aperture (i.e.

slit width) a gets larger. For the double slit diffraction pattern, what “part” of the grating is

responsible for the envelope of the diffraction pattern? What, then, is responsible for the more

defined peaks within the envelope of the double-slit diffraction pattern?

I have no idea how to go about this question???

How did Abraham Lincoln’s position on slavery and the status of Blacks in America change over time? What accounts for his shifts? Cover the period from 1854 to 1865....

an iceberg with a mass 25,00 kg is floating next to your cruis ship in the north atlantic. the density of ice is 0.920 g/cm^3 , the density f seawater is 1.03 g/cm^3 and the density of freshwater is 1.00 g/m^3. the mass of a proton or neutron is 1.67x10^-27 kg

1) what is the buoyant force on the iceberg?

2) what fraction of the iceberg is above water?

3) calculated the number density of ice and freshwater and compare them

a cannon with mass 400 kg sits atop a narrow wall and horizontally launched an aid packet to hungry villagers a distance 2km away. someone forgot to lock the wheels of the cannon and the recoil causes it to roll backwards off the wall. if the aid packet has a mass of 10kg and there is no friction in the wheel bearings of the cannon, how far does the cannon land behind the wall?

you are playing a game at the carnival. you want to launch a puck of mass m up an incline by compressing a spring-loaded plunger with spring constant k. i you compress it the right amount, it reaches the cup at the puck's turning point and the puck falls into a cup at height h. compress too little, and the puck doesnt make it high enough. too much, and the puck overshoots the cup because is projects over the cup. the track is pretty much frictionless…except. uh-oh! Someone has spilled sticky soda on the flat part of the track. the stick patch has a lenght L and coefficient of kinetic friction muk. calculate how much you should compress the spring. express your answer in terms of some or all of k, h, g, L, muk and m. make sure your assumptions are clear

One stone is dropped off a bridge. Another stone is dropped one second later. assuming free fall which of the following statements is the most accurate description for times when both are falling?

there were four options however i know the answer is as the stones fall, their relative position increases in magnitude but why is the answer not as the stones fall their relative velocity increases in magnitude?

In which of the following cases has work been done by the person on the book:

The book is held at rest above the person’s head.

The person pushes the book against the wall and it is held there by friction.

The person pushes a book along the floor with her foot in a circular path until it is returned to its starting point.

Justify your answer.

A skateboarder is perched at the top of a perfect half‐pipe on a perfect skateboard.

Cool, dude…except there is a trap door at the bottom of the curve! See figure. The trap door will trigger

if the force exerted down on it is greater than 1000 N. The radius of the semi‐circular half pipe is 3.4 m.

The total mass of skate boarder and skate boarder is 56 kg. The velocity of the skateboarder when he is at the bottom of the half-ipe is 2.44m/s

Use Newton’s 2nd law for the radial component and the speed in part 1 to find the apparent

weight (aka normal force) on the skateboarder at that instant. Does the trap door trigger?

how can I find the apparent weight someone please help?

Rory is tired of being a “good girl” so she

decides to follow Logan on one of his crazy

rich-boy adventures. They leave Yale in the

middle of the semester, fly down to Costa

Rica and travel down the San Juan River. At

one point, Logan is floating down the river in

an inner tube and Rory plans shenanigans.

She is going to jump off of a 4.5-m tall cliff

into the water as close to Logan as possible,

so she has to time her jump just right. Logan

is floating at a lazy speed 2.4 m/s down river

7.5 m from the base of the cliff (see

diagram). Rory has a maximum running

speed of 6.2 m/s if she runs horizontally off

the cliff

How far upstream should Logan be when

she jumps if she is going to achieve her

closest splash?

on sledding hill the sledding slope has an incline of about (theta). assume the coefficient of kinetic friction between the sled and ice is mu and that there is not too much friction to slide

Calculate the acceleration of the sled as a function of the acceleration of free fall g, the angel of the incline theta, and the coefficient of the kinetic friction mu.

on sledding hill the sledding slope has an incline of about (theta). assume the coefficient of kinetic friction between the sled and ice is mu and that there is not too much friction to slide

Calculate the acceleration of the sled as a function of the acceleration of free fall g, the angel of the incline theta, and the coefficient of the kinetic friction mu.