In eukaryotic cells, protein synthesis takes place at the:
A) nucleus
B) mitochondria
C) chloroplasts
D) ribosomes
E) lysosomes
What is (D) Protein synthesis takes place at the ribosomes of eukaryotic cells.
100
Which of the following is not a strong acid?
A) HF
B) HCl
C) H2SO4
D) HNO3
E) All are strong acids
What is (A) strong acids are acids that are completely ionized in water to produce good electrical conductors.
100
What is the hybridization of the nitrogen atoms when it forms one sigma and one pi bond?
A.) sp
B.) sp2
C.) sp3
D.) nitrogen only forms sigma bonds
E.) nitrogen only forms pi bonds
What is B. sp2
100
A man is standing 5 ft away from the foot of a 12 ft wall. If he holds a rope whose other end is tied to the top of the wall, what is the minimum length of the rope (neglect the height of the man)
A.) 13 ft
B.) 12 tan (2) ft
C.) 5 sin (1/2) ft
D.) 13 cos (1/2) ft
E.) 15 ft
What is A.) 13 ft
100
At the end of mitosis, the daughter cells are ______
A.) haploid
B.) diploid
C.) sister chromatids
D.) homologous
E.) recombinants
What is B.) diploid
200
The evolutionary history of a species, or groups of related species, is referred to as:
A) phylogeny
B) speciation
C) the fossil record
D) paleontology
E) pedigree analysis
What is (A) Phylogeny traces the evolutionary history of species or related groups of species.
200
The density of alcohol is 0.8 g/ml. What volume of alcohol would weigh 65.0g?
A) (65.0)(0.8)
B) (65.0)/(800)
C) (0.8)/(65.0)
D) (0.8)(65.0)
E) (65.0)/(0.8)
E)
What is (E) Density = (weight/Volume)
200
Which of the following is the worst leaving group for an Sn1 reaction?
A.) R-NH3
B.) R-H2O
C.) R-Br
D.) R-Cl
E.) R-F
What is A.) R-NH3
200
When the price of milk was increased by 20%, a family reduced its consumptions such that no extra expenditure is incurred on milk, If the family consumed 30 liters per month before, find the new monthly consumption.
A.) 20 liters
B.) 22 liters
C.) 25 liters
D.) 28 liters
E.) 29 liters
What is C.) 25 liters
200
Normal cells in the human body divide approximately 70 times before they die. This property of cells is called:
A.) senescene
B.) contact inhibition
C.) differentiation
D.) metastasis
E.) immortality
What is A.) senescence
300
In vertebrate organisms, oxygen and carbon dioxide are transported throughout the body by binding to:
A) water molecules in the blood
B) hemoglobin in white blood cells
C) hemoglobin in red blood cells
D) lymph in white blood cells
E) lymph in red blood cells
What is (C) Hemoglobin is a blood pigment that gives red blood cells their characteristic color.
300
Arrange the following in decreasing atomic radius: O, S, K, Ca, Mg
A) K, Ca, Mg, S, O
B) K, Mg, Ca, O, S
C) Ca, K, Mg, S, O
D) O, S, Ca, Mg, K
E) S, O, Mg, Ca, K
What is (A)
300
Which of the following intermediates are formed during an SN2 reaction?
A.) Allylic
B.) Vinyl
C.) tetrahedral
D.) Cyclic
E.) none of the above
What is E.) none of the above
300
The average of 3 numbers is 32. The first number is as much more than the average as the second number is less than the average. Find the third number.
A.) 32
B.) 40
C.) 33
D.) 35
E.) 30
What is A.) 32
300
Alkene Synthesis can be achieved by which of the following reactions?
A.) Grignard Reaction
B.) Witting Reaction
C.) Hydroboration/oxidation
D.) Dihydroxylation
E.) Oxymercuration/demercuration
What is B.) Witting Reaction
400
Which hormone is not secreted by a gland in the brain?
A) Human chorionic gonadotropin (HCG)
B) Gonadotropin releasing hormone (GnRH)
C) Luteinizing hormone (LH)
D) Follicle stimulating hormone (FSH)
E) None of these
What is (A) HCG is secreted by the trophoblast, part of the early embryo, following implantation in the uterus.
400
The principle quantum number of the atom is symbolized
A. ms
B. ml
C. n
D. l
E. s
What is C: The principle quantum number is the value "n" and can only be a positive whole number integer.
400
A high molecular weight compound that is insoluble in water, insoluble in 6M NaOH, and soluble in HCl is a(n):
A.) Amine
B.) Aldehyde
C.) Ketone
D.) Carboxylic Acid
E.) Alcohol
What is A.) Amine
400
Three people can do a job alone in 5 days, 6 days, and 8 days, respectively. In how many days can they complete a job when all three are working on it together?
A.) 3 days
B.) 2 days
C.) 60/29 days
D.) 120/59 days
E. 80/39 days
What is D.) 120/59 days
400
In PCR, DNA annealing occurs at:
A.) 50-60 degrees C
B.) 72 degrees C
C.) 94-96 degrees C
D.) 98 degrees C
E.) None of the above
What is A.) 50-65 degrees C
500
Hummingbirds drink nectar from Ipomopsis flowers. Ipomopsis are trumpet-shaped, and hummingbirds have long narrow beaks to access the nectar. These adaptations could best be described as:
A) Divergent evolution
B) Convergent evolution
C) Parallel evolution
D) Coevolution
E) Macroevolution
What is (D) In coevolution, one species responds to new adaptations in another.
500
The density of alcohol is 0.8 g/ml. What volume of alcohol would weigh 65.0g?
A. (65.0)(0.8)
B. (65.0)/(800)
C. (0.8)/(65.0)
D. (0.8)(65.0)
E. (65.0)/(0.8)
What is E: Density = (weight/Volume) Make sure your units are in g/ml.
500
Which of the following compounds will produce a single product when it is treated with sodium methoxide?
A.) 2-chloro-3-ethylpentane
B.) 2-chloro-4-methylpentane
C.) 3-chloro-3-ethylpentane
D.) 3-chloro-2-methylpentane
E.) None of the above
What is C.) 3-chloro-3-etheylpentane
500
Two trains of equal length are traveling on parallel tracks in the opposite direction at speed of 48 mph and 60 mph. If they take 12 seconds to pass each other, what is the length of each train?
A.) .01 mile
B.) .1 miles
C.) .18 miles
D.) .2 miles
E.) 2 miles
What is C.) .18 miles
500
If a women is a carrier for the recessive allele that causes hemophilia, what is the probability that she will have a daughter or son who is affected by the disease if he husband is also heterozygous for the allele?
A.) 0%
B.) 25%
C.) 50%
D.) 75%
E.) None of the above