Biology
The movement of water soluble molecules through cell membranes, from higher to lower concentrations, by attachment to a carrier protein, describes A. diffusions. B. osmosis. C. pinocytosis. D. active transport. E. facilitated diffusion.
What is facilitated diffusion?
How many grams of NaOH (40 g.mol -1) are there in 250 mL of 0.4 M NaOH solution?
What is 4 grams?
The reduction of a ketone
A. an aldehyde first, then a primary alcohol. B. a primary alcohol. C. a secondary alcohol. D. a tertiary alcohol. E. a carboxylic acid.
What is a secondary alcohol?
What is C?
Which is the smallest? A. 11/15 B. 4/5 C. 21/25 D. 5/6 E. 13/17
What is A) 11/15?
Starch, cellulose and glycogen are all A. proteins. B. linked internally by hydrogen bonds. C. water soluble. D. polymers of glucose. E. nucleic acids.
what is polymers of glucose?
When the volume of a gas is decreased at constant temperature, the pressure increases because the molecules A. move faster. B. move slower. C. become heavier. D. become lighter. E. strike a unit area of the container more often.
What is strike a unit area of the container more often?
The two Bronsted-Lowry bases in the equilibrium below are HOAc + NaCN = HCN + NaOAc
A. HoAc + NACN
B. HOAc + NaOAc
C. NaCN + NaOAc
What is NaCN + NaOAc?
Select the correct end view:
What is D?
At a certain convention the ratio of men to women was 3 to 8. If there were 352 people there, how many were men? A. 32 B. 96 C. 132 D. 220 E. 256
What is 96?
Organisms that obtain their energy from light can be termed A. autotrophic. B. holotrophic. C. chemotrophic. D. heterotrophic. E. heliotrophic.
What is heliotrophic?
Water has a higher boiling point than compounds of a similar molecular weight. Which best explains this phenomenon? A. Extensive hydrogen bonding exists between water molecules. B. One of the natural isotopes of hydrogen, deuterium, is present in sufficient quantities to significantly raise the boiling point. C. Water is a polar covalent compound. D. Van der Waals forces exist between individual water molecules. E. Water is largely dissociated leading to large electrostatic forces between individual water molecules.
What is Extensive hydrogen bonding exists between water molecules?
A characteristic feature of the SN2 reaction mechanism is that A. it follows first-order kinetics. B. it produces stereochemical inversion of configuration. C. there is no rate-determining step. D. steric factors have little influence on the reaction rate constant. E. collision of three or more particles is required.
What is it produces stereochemical inversion of configuration.?
Rank each in terms of degrees from small to large:
What is B) 2-1-4-3?
The perimeter of a square is 20. Which represents the area? A. 5 B. 10 C. 20 D. 25 E. 100
What is 25?
Assuming no linkage, how many different kinds of gametes can be produced by an organism with the genotype AaBbcc?
What is 4?
A substance is non-conducting as a solid and melts at 750°C. The melt conducts electricity. The solid is observed to be soluble in water. This substance would be best classified as A. molecular. B. ionic. C. macromolecular. D. metallic. E. polymeric.
What is ionic?
The most acidic type of hydrogen in the following compound is:
What is A?
Determine the position of the holes on the original square:
What is C?
If 3 liters of 40% orange juice and 1 liter of 50% orange juice are mixed, which is the percentage of orange juice in the mixture? A. 90 B. 85 C. 47.5 D. 45 E. 42.5
What is E: 42.5%?
In human beings, color blindness is controlled by an X-linked recessive allele. In a cross involving this X-linked trait, the male parent has normal color vision, but the female parent is a carrier. What are the chances (in %) that a male offspring will inherit color blindness? A. 10 B. 25 C. 50 D. 75 E. 100
In which reaction is H2O considered to be acting as an acid? A. Zn(s) + 2H3O+ Zn2+ + H2(g) + H2O
B. HCl(g) + H2O H3O+ + Cl -
C. HC2H3O2 + H2O H3O+ + C2H3O2 -
D. NH3 + H2O NH4 + + OHE. NH3 + H3O+ NH4 + + H2O
What is D?
What is the product of the reaction shown below?
What is C?
In Figure B how many cubes have four of their exposed sides painted?
What is B) 2 Cubes?
If x = (1/2) and z = (14/35), then which is equal to (1/x) / z? A. 1/5 B. 4/5 C. 5/4 D. 5/2 E. 5
What is E: 5?