1. A solution with a pH below 7 is ____________
a. logarithmic. b. acidic. c. neutral.
d. basic.
2. Which element is the backbone of all organic
compounds?
a. carbon b. nitrogen c. oxygen d.
phosphorus
3. Changing the number of electrons of an atom changes its:
a. charge b. element c. ion d. isotope
4. All living things must maintain a constant internal
environment to function properly and does so through the process of
_______________.
a. homology b. biogenesis c. heritability d.
homeostasis
5. Two elements that share electrons are said to have formed
a(n) ___________ bond.
a. hydrogen b. ionic c. covalent d. carbonic
6. Fats, oils, waxes and steroids are examples of
what______________.
a. carbohydrates b. proteins c. nucleic acids
d. lipids
7. Sugar, starch and cellulose are all examples of
______________.
a. carbohydrates b. proteins c. nucleic acids
d. lipids
8.______________works to keep biological conditions within a
specific normal range and acts to decrease deviations from
normal.
a. Karma
b. Positive feedback
c. Negative feedback d. Neutral
feedback
9. Enzymes are responsible for ______________________.
a. Structure b. stored energy c. lowering the
activation energy of a reaction d. stored info
10. Photosynthesis generates ________, which are used as an
energy source in both plants and animals.
a. carbon dioxide b. sugars c. oxygen d. water
11. Which of the following can affect the rate of
enzyme-mediated reactions?
a. salt concentration b. temperature c. pH d. all of the
above
12. After the complete oxidation of glucose some of the energy
is now stored in molecules of ATP, NADH and FADH2. Energy
conversion is not 100% efficient, what has happened to the
remaining energy?
a. It becomes water. b. It increases. c. It is lost
as waste heat. d. It recycles back to glucose.
13. In humans, which substance is produced in the absence of
oxygen during strenuous activity?
a. carbon dioxide b. lactic acid c. alcohol d.
glycogen
14. Diffusion of water through a semi-permeable membrane is
a. diffusion b. active transport c. passive
transport d. osmosis
15. A eukaryote has ________________.
a. a nucleoid region b. mitochondria c. a nucleus d.
Golgi apparatus
16. An example of passive transport is
a. Sodium-potassium pump b. phagocytosis c. diffusion d.
Hydrogen pump
17. An example of _______is when ions cross a membrane at
transport proteins that require energy.
a. diffusion b. active transport c. passive
transport d. facilitated diffusion
18. Immerse a living cell in a hypotonic solution, and water
will tend to
a. diffuse into the cell b. diffuse out of the cell
c. show no net movement d. move in by
endocytosis
19. Which is a principle of the Cell Theory?
a. Cells are the basic units of matter. b. All cells
arise from preexisting cells.
c. All organisms are not made of one or more cells.
d. All matter consists of at least one cell.
20. Multicellular organisms were able to evolve in part due to
the evolution of
a. lysosomes b. cell-cell junctions c.
flagella d. chloroplasts
21. You are looking at a cell under a microscope and you
immediately recognize it as an plant cell because you see
____________________.
a. a cell wall b. a central vacuole c.
lysosome d. a & b
22. ___ are cell organelles that contain DNA and can be used to
reconstruct evolutionary relationships.
a. Lysosomes b. Glogi apparatuses c. Mitochondria d.
Ribosomes
23. Suspended in the eukaryotic cell’s cytoplasm are tiny
___________________.
a. flagella b. organelles c. organs d. little green
men
24. Chromatids that are attached at the centromere are called
_____________ chromatids?
a. mother b. sister d. brother d. father
25. Cancer primarily results due to __________________.
a. uncontrolled cell division b. centrosome c. centromere
d. cell plate
26. Daughter cells resulting from meiosis________________.
a. have the same number of chromosomes as the parent
cell b. have both homologous pairs
c. have half the chromosomes as the parent cell d. all of the
above
27. Which of the following is not part of sexual
reproduction?
a. A haploid sperm fuses with a haploid egg in a process
called fertilization.
b. Diploid germ cells give rise to haploid gametes.
c. Gametes are produced by a process called mitosis.
d. Crossing over and independent assortment during meiosis
contribute to genetic diversity in offspring.
28. How does the sequence of a strand of DNA correspond to the
amino acid sequence of a protein ? This concept is explained by the
central dogma of molecular biology which states that:
a. RNA is used to make DNA. b. DNA is used to make
Protein which is used to make RNA.
c. Proteins are manufactured directly from DNA without any
intermediate. d. None of the above
29. The series of three consecutive mRNA bases coding for one
specific amino acid in a protein is called a
a. intron. b. exon. c. transposon. d.
codon.
30. The chromosome is essentially the same as :
a. condon b. intron c. chromatin d. exon
31. A(n) _____ mutation is when a wrong nucleotide gets
placed into a strand of DNA
a. translocation b. inversion c. frame shift
d. insertion
32. tRNA ____________
a. is produced during the process called translation.
b. is an integral component of ribosomes.
c. carries the proper amino acid to the ribosome d. is
responsible for the DNA.
33. The single stranded molecule that is transcribed from a DNA
template and is subsequently used to guide the manufacture proteins
is _________.
a. mRNA b. rRNA c. snRNA d. tRNA
34. What is a gene?
a. All the genetic material. b. All the DNA in a
nucleus of an eukaryotic cell.
c. A continuous strand of RNA d. A sequence
of DNA that specifies the sequence of amino acids of a particular
protein.
35. How many amino acids are coded for by the following mRNA
sequence (assuming NO start or stop codons are included):
UAUCAUCCCCACACA
a. four b. five c. six d. seven
36. Which of the following is one of the roles that our DNA
plays?
a. DNA attaches to ribosome. b. DNA transfers
energy. c. DNA never changes. d.
DNA controls the cell.
37. Which one of the following nitrogenous bases is not found in
RNA:
a. thymine b. cytosine c. uracil d. Guanine
38. In _____________________, the cross between organisms with
two different phenotypes produces a third phenotype that expresses
both parental traits.
a. complete dominance b. co-dominance c. incomplete dominance
d. true breeding
39. The cleft (dimple) chin seen in both Kirk and Michael
Douglas is an example of one’s _________
a. genotyope b. phenotype c. haplotype d.
tintype
40. In genetics,dominant refers to an allele that
_______________.
a. requires 2 copies to be expressed b. requires
only 1 copy to be expressed c. hidden
d. B and C
41. People with Kleinfelter syndrome have 47 chromosomes,
including three sex chromosomes (XXY). What is the term used to
describe the mistake that occurs during meiosis that results in
this abnormal chromosome number?
a. independent assortment b. crossing over c.
recombination d. nondisjunction
42. If two people who are both carriers for a genetically
inherited fatal recessive disease decide to become parents, what
will be the odds that their children will also be get the
disease?
a. 25% b. 50% c. 75% d. 100%
43. If a person with AO blood type marries a person with OO
blood type, what are their kids possible blood types?
a. AB only b. A or O c. A only d. A, B, or O
44. Which of the following is correct concerning
sex-linked characteristics?
a. Sex-linked characteristics can be found on either the X or Y
chromosome. b. Hemophilia and red-green color blindness
are X-linked genetic disorders. c. Daughters of a
color blind male are always color blind. d. a, b & c.
45. Being able to curl up your tongue into a U-shape is under
the control of a dominant allele at one gene locus, which means in
the homozygous recessive condition the tongue cannot be rolled. A
woman who can roll her tongue marries a man who can also roll his
tongue. Their 1st child can’t roll her tongue. What are the
phenotypes of the parents?
a. tt, tt b. TT, TT c. Tt, Tt d. Tt, TT
46. A true breeding plant _________________.
a. is heterozygous for the trait of interest. b. is
homozygous dominant for the trait of interest.
c. is either homozygous dominant or homozygous recessive for the
trait of interest. d. is homozygous for trait
47. Height and weight are examples of
___________________variation.
a. discontinuous b. continuous c. non-inherited d.
recessive
48. Which is most closely associated with the process of
artificial selection?
a. The large variety of breeds of dogs. b. A male lion's
mane.
c. The evolution of mimicry certain insects. d. A desire of
males to mate with certain females.
49. A group of mice becomes separated by the formation of a
river. Over time, the northern mice became smaller and whiter,
while the southern mice became larger and browner. This is an
example of __.
a. gigantification b. industrial melanism c.
divergence d. homology
50. The individual considered less fit, in the evolutionary
sense, would be the __.
a. individual with least amount of offspring b. longest lived
individual
c. individual who produces the greatest number of fertile
offspring d. strongest individual
51. Which concept was not included in Charles Darwin's theory of
natural selection?
a. human genome b. overproduction of offspring c. struggle
for existence d. survival and reproduction of the fittest
52. Because of prolonged drought, the trees on an island are
producing nuts that are much smaller with thicker and harder
shells. This example illustrates ___ selection.
a. stabilizing b. disruptive c. directional d. artificial
53. Which of the following is likely to have been the product of
sexual selection?
a. bright colors of female flowers b. the ability of desert
animals to concentrate their urine
c. camouflage coloration in animals d. a male lion's mane
54. The process in which a population moves into a relatively
unexploited environment and then undergoes rapid evolutionary
divergence to produce many separate species is called __.
a. ontogeny b. convergent evolution c. disruptive selection d.
adaptive radiation
55. A certain species of land snail exists as either a cream
color or a solid brown color. Intermediately colored snails are
rare. This illustrates __ selection.
a. disruptive b. random c. stabilizing d. directional
56. Many introduced (invasive) species have had deleterious
effects on communities and ecosystems because __.
a. the introduced species are long-lived b. predators prefer the
introduced species
c. coevolved parasites and competitors are absent in the new
habitat d. they become easy prey
57. If biological magnification of a toxin occurs, the ___ will
have the highest levels of toxins in their systems.
a. producers b. herbivores c. primary carnivores d. top
carnivores
58. Which of these is not a population density-dependent
regulating factor?
a. stress b. competition c. disease d. earth quake
59. An ecological niche is an organism's_______ in an
ecosystem.
a. function b. habitat c. location d. resources
60. No matter how rapidly a population grows, it will eventually
reach a limit and begin to stabilize. This is called the ___ of the
environment.
a. growth rate b. succession c. carrying capacity d. life
history
61. Sea anemones growing on the backs of crabs that damage the
the crabs are an example of
a. Parasitism b. Commensalism c. Mutualism d. Competition
62. All of the populations of different species that occupy and
are adapted to a given area are referred to by which term?
a. community b. biosphere c. species d. niche
63. A successful parasite will __.
a. kill its host fairly rapidly b. benefit its host
c. be able to feed without killing its host d. not harm its
host
64. This biome contains the second greatest diversity of
plants and animals
a. rainforest b. desert c. tundra d. savanna
65. Science is one very interesting area of study because it
is
a. interesting b. important c. relevant to my life d. a, b,
& c