BIOLOGY 0255 – A molecular gradient can best be described

10 Jun BIOLOGY 0255 – A molecular gradient can best be described

Question
A molecular gradient can best be described as….

a rainbow

equilibrium

a homogeneous solution

neighboring solutions that have unequal concentrations of molecules

Flag this Question

Question 2

1 pts

Equilibrium with respect to gases and liquids can best be described as…

the search for social equality

the end of diffusion

molecular equality

metaphysical balance

Flag this Question

Question 3

1 pts

In this lab, we will use dialysis tubing to….

simulate biological membranes

separate blood from urine

turn starch blue

turn starch brown

Flag this Question

Question 4

1 pts

Biological membranes have different types of pores and channels, and different permeabilities to small molecules depending on size and charge. In this lab, you can assume that the membranes we are using are permeable to….

starch

water and potassium iodide

complex sugars

small animals

Flag this Question

Question 5

1 pts

Simple sugars, or reducing sugars, can be detected with….

starch

iodine

glucose

Benedict’s solution

Flag this Question

Question 6

1 pts

If there is more solute (salt, sugar, ions) outside of a cell, and the cell membrane is not permeable to any of the solutes, what is likely to happen?

water will enter the cell

water will leave the cell

solutes will enter the cell

solutes will leave the cell

Flag this Question

Question 7

1 pts

Kinetic energy is an inherent property of the atom, and therefore more complex structures such as molecules. You can actually see kinetic energy of non-living things in action under the microscope. When we visualize this, we call what we see…

diffusion

Brownian motion

osmosis

all of the above

Flag this Question

Question 8

1 pts

One word to describe the effect of diffusion across a membrane, which alters the water pressure on one side of the membrane with respect to the other is….

Flag this Question

Question 9

1 pts

When two gases diffuse towards each other down a long tube, and somewhere in the tube a white ring forms, you can conclude that…

a chemical reaction has taken place between the gases

someone forgot to clean the tube

the gases are inert

the gases were actually unable to diffuse

Flag this Question

Question 10

1 pts

If two gases of unequal molecular mass diffuse towards one another in a closed glass tube, they are more likely to react in which part of the glass tube?

the gases would meet in the middle and react

the gases would meet closer to the start of the light gas and react

the gases would meet closer to the heavy gas and react

the gases would never react