question

1. Which of the following is a major difference between mitosis and meiosis? A)Interphase is present only in mitosis B)Homologous chromosomes associate only in meiosis C)DNA replication occurs only in mitosis D)Daughter Chromatids separate only in meiosis E)Chromosomes line up on the cell equator only in meiosis

answer

B

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2. If X units of DNA are present in the nucleus of a cell, which has just divided, what is the relative amount present in this cell during prophase of the next mitosis? a. X/4 b. X/2 c. X d. 2X e. 4X

answer

C

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3. The following events occur in mitosis and/or meiosis. Which event occurs only in meiosis? a. Chromatid formation b. Chromosome condensation c. Chromosome movement to poles d. Homologous chromosomes pairing

answer

D

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4. Which statement correctly describes homologous chromosomes? a. They are formed during meiosis. b. They are held together by centromeres. c. They are identical. d. They carry the same gene loci. e. They are separated during mitosis.

answer

D

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5. Where in the cell is the cell's DNA located? a. Cytoplasm b. Mitochondria c. Ribosome d. Nucleus e. Plastids

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D

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6. How many chromosomes does a normal human cell have? a. 13 b. 23 c. 26 d. 46 e. 52

answer

D

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7. How many daughter cells are produced from meiosis and mitosis? a. 4, 2 b. 2, 2 c. 1, 2 d. 2, 4 e. 1, 1

answer

A

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8. The genes that malfunction in cancer normally a. control RNA transcription. b. are responsible for sex determination. c. code for enzymes that repair damaged DNA. d. are not present in most body cells unless inserted by a virus. e. regulate cell division.

answer

E

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9. Your muscle and bone cells are different because (2) a. they contain different sets of genes. b. they are differentiated. c. they contain different operons. d. different genes are switched on and off in each type of cell. e. they contain different histones.

answer

B or D

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10. Humans have ___ pairs of chromosomes. a. 23 b. 46 c. 96 d. 101

answer

A

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11. The major site of protein synthesis is the a. nucleolus b. ribosome c. plasma membrane d. chloroplast

answer

B

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12. After mitosis, what is the relationship between the mother cell and the resulting daughter cell? a. the mother is diploid and the daughter is haploid b. the mother is haploid and the daughter is diploid c. they are identical d. they are different

answer

C

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13. Strategies for the treatment of various types of cancer involve:(2) a. preventing the reconstruction of telomeres. b. removing the source of hormones that stimulate tumor growth. c. preventing the development of blood vessels to tumors (most important prevent angiogenesis). d. blocking cell division with chemicals. e. all of the above.

answer

C or E

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14. Which of these factors is NOT a reason for the resurgence of bed bugs in the United States? a. Poor hygiene among tenants and homeowners b. Increased international travel c. Increased resistance of bugs to pesticides d. A lack of knowledge about effective pest control and management

answer

A

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15. Bed bug infestations can cause all of the following, except: a. Allergic reactions from bites b. Anxiety and stress c. Infectious disease d. Insomnia

answer

C

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16. At what time of day do bed bugs typically feed? a. Early morning b. Nighttime c. Afternoon d. Noon

answer

A

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17. What physical traits can help you determine if an insect is a bed bug? a. About the size of a pencil eraser, black body and wings b. About the size of a pinhead, red/brown body and no wings c. About the size of a Matchbox car, black body with red dots d. They're too small to see and impossible to detect with the naked eye.

answer

B

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18. Which group has been known to get bed bugs? (2) a. The poor b. International travelers c. The wealthy d. All of the above

answer

C or D

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19. How many treatments does it normally take to completely rid a home of an infestation? a. One treatment b. Two treatments c. Three or four treatments d. Five or six treatments

answer

C

question

20. Which is NOT an important root function? a. supports leaves b. anchors plant c. absorbs and transports water and minerals into plant d. storage of food for trees during periods of dormancy.

answer

A

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21. The egg is found in the __________ of the pistil and this develops into the __________ following fertilization. a. stigma; fruit b. style; endosperm c. ovary; fruit d. ovary; inflorescence.

answer

C

question

22. Plants that lack showy flowers are probably pollinated by: a. bees b. ants c. hummingbirds d. the wind.

answer

D

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23. Which of the following is NOT a eukaryote? a. fungi b. bacteria c. plants d. animals e. protistans

answer

B

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24. A rod-shaped prokaryote is called a _______________. a. flagellum b. spirillum c. coccus d. bacillus

answer

D

question

25. A spherical prokaryote is called a _______________. a. flagellum b. spirillum c. coccus d. bacillus

answer

C

question

26. A spiral of corkscrew-shaped prokaryote is known as a a. flagellum b. spirillum c. coccus d. bacillus

answer

B

question

27. A _______________ is a technique used to determine whether or not a bacterium has a cell wall that contains peptidoglycan. a. lytic infection b. lysogenic infection c. sterilization d. Gram stain

answer

D

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28. A type of asexual reproduction in which a prokaryote replicates its DNA, and divides in half, producing two identical daughter cells is ________________. a. conjugation b. binary fission c. meiosis d. nitrogen fixation

answer

B

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29. Formed when bacterium produces a thick internal wall that encloses its DNA and a portion of its cytoplasm is known as a(n) _______________. This structure ensures the survival of a bacterium through periods of environmental stress a. pathogen b. endotoxin c. endospore d. peptidoglycan e. gram positive

answer

C

question

30. A _________________ is an infectious particle made of protein rather than RNA or DNA. a. retrovirus b. capsid c. bacteriophage d. prion

answer

D

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31. A(n) _______________ is a particle made up of nucleic acid, protein, and in some cases lipids that can replicate only by infecting living cells. a. pathogen b. virus c. endospore d. antibiotic

answer

B

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32. The caterpillar pictured here has wasp pupae attached that will hatch and then consume the caterpillar. This relationship is an example of a. mutualism b. commensalism c. parasitism d. sexual selection

answer

C

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33. In a healthy ecosystem, trophic level A will be composed of a. carnivores b. herbivores c. heterotrophs d. autotrophs e. producers

answer

E

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34. A relationship between two organisms of different species in which one benefits, while the other neither benefits nor is harmed: a. mutualism b. symbiosis c. commensalism d. parasitism

answer

C

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36. An organism whose removal from an ecosystem may cause the collapse of that ecosystem is known as a(n) a. dominant predator b. tertiary consumer c. herbivore d. keystone species

answer

D

question

38. As a population grows, factors that slow or limit the growth of the population include a. competition for resources b. disease and parasitism c. emmigration d. predation e. all of the above

answer

E

question

40. Ants are known to protect, or "tend" aphids from predators, and in return receive some nutrients from the aphids. This relationship is an example of a. commensalism b. mutualism c. parasitism d. sexual selection

answer

B

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41. Most extinctions occurring on the planet today are due to a. hunting b. loss of habitat c. global warming d. invasive species

answer

B

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42. A foreign species of organism, introduced into a new ecosystem, will not become invasive unless a. the population is sufficiently large to allow for natural breeding b. pregnant females are released c. it is well suited to the habitat into which it is being released d. people help care for them until they adapt e. there is an available niche, or a weaker competitor occupies that niche

answer

A

question

43. Most climate models predict that during this century, the average temperature a. on land will increase, and the average ocean temperatures will decrease b. on land will decrease, and the average ocean temperatures will increase c. on land will decrease, as will the average ocean temperatures d. on land will increase, as will the average ocean temperatures

answer

D

question

45. Wastes and dead organisms from the food chain will be fed upon by a. decomposers b. tertiary consumers c. autotrophs d. herbivores

answer

A

question

46. Bees collect nectar from flowers, and serve as pollinators for the plants. This relationship is an example of a. predator-prey b. commensalism c. mutualism d. parasitism

answer

C

question

47. Examples of symbiotic relationships include a. parasitism b. commensalism c. cannibalism d. mutualism

answer

D

question

48. The plant shown here is Russian thistle, better known as tumbleweed. It was accidentally introduced into the United States in the nineteenth century in contaminated flax seed. The fact that it has spread throughout the western United States suggests that a. it has an efficient seed dispersal mechanism b. regions of Russia have a climate similar to the western United States c. it is being farmed as an agricultural crop d. it is an attractive garden plant

answer

A

question

50. Invasive species may harm an ecosystem by a. introducing new diseases b. outcompeting native species c. altering habitat d. All of the above

answer

D

question

51. What part of the female reproductive system produces eggs? a. Oviducts b. Uterus c. Ovary d. Vagina

answer

C

question

52. Prokaryotic cells have defined nuclei. a. True b. False

answer

B

question

53. Double-stranded viruses can reproduce using the lytic cycle. Which of the following is characteristic of the lytic cycle? a. Viral DNA is incorporated into the host chromosomes. b. The viral genome replicates without destroying the host. c. The viral DNA transcribes itself and creates all the products needed for assembly d. The virus penetrates the host and injects protein into the cell

answer

A

question

56. The menstrual cycle prepares the uterus for a fertilized egg. How long is an average menstrual cycle from start to finish? a. 20 days b. 2 weeks c. 28 days d. 7 days

answer

C

question

57. What term do we use to describe a sperm cell fusing with an egg cell? a. Combination b. Reproduction c. Fertilization d. Intercourse

answer

C

question

58. Which part of the male reproductive system produces the sperm cells? a. Testes b. Penis c. Scrotum d. Sperm duct

answer

A

question

59. Purple loosestrife, originally brought to North America accidentally on cargo ships, reproduces very quickly and aggressively, often crowding out species like the cattail that have been growing in British Columbia for thousands of years. The cattail is an example of a. Introduced species b. Invasive species c. Non-native species d. Native species

answer

D

question

60. Zebra mussels, an invasive species that is pushing local species of freshwater shellfish to extinction, were introduced to the Great Lakes by: a. Migrating Americans b. Teenagers playing a prank c. Ballast water (sea water that ships carry for stability and then discharge) d. None of the above

answer

C

question

61. Each year, invasive species are estimated to cost the U.S. economy: a. $12 thousand b. $120 thousand c. $12 million d. $129 billion

answer

D

question

62. Twins that result from the splitting of one zygote are called a. universal b. fraternal c. identical d. mitochondrial

answer

C

question

63. Oöcytes are: a. ova that have not yet completed the oögenesis process b. the locations on chromosomes where ova are produced c. the male equivalent of ova d. the fertilized egg

answer

A

question

64. Viruses differ from living organisms in that viruses... a. have nucleic acid b. cannot reproduce on their own c. can transform energy d. can make protein

answer

B

question

65. Which of the following statements about human reproduction is true? a. Mitosis in males is also known as spermatogenesis. b. Sperm and ova are zygotes. c. Oögenesis takes place in the ovaries of females.

answer

C

question

66. The normal period of pregnancy from the end of the last menstrual cycle. a. 40 weeks b. 37 weeks c. 35 weeks d. 43 weeks

answer

A

question

67. In which structure does fertilization occur? a. ovary b. vagina c. fallopian tube d. uterus

answer

C

question

68. Which of the following does sperm NOT travel through? a. ureter b. urethra c. vas deferens d. epididymus

answer

A

question

69. What is the correct order for how a virus makes more viruses through infecting a host cell? #1 inject #2 release #3 attach #4 replicate a. 1, 2, 3, 4 b. 4, 3, 2, 1 c. 1, 3, 2, 4 d. 3, 1, 4, 2 e. 3, 4, 1, 2

answer

D

question

70. What is the human form of Mad Cow Disease called a. Creutzfeldt-Jacob disease b. scrapie c. spongiform encephalitis d. chronic wasting disease

answer

C

question

71. Bacteria cause about percent of illnesses? a. 20% b. 10% c. 80% d. 50%

answer

D

question

72. Which is an example of an RNA virus? a. HIV/AIDS b. Smallpox c. Herpes d. Hepatitis B.

answer

A

question

73. Of the two basic pathways of viral release which involves a large number of viruses being released? a. budding b. penetration c. bursting d. lysis

answer

D

question

74. Gram___________ bacteria have thicker peptidoglycan walls and stain____________ a. positive, pink b. negative, pink c. positive, purple d. negative, purple

answer

C

question

75. How do most antibiotics work? a. By preventing viral attachment b. By inhibiting peptidoglycan c. By eliminating exotoxins d. By preventing budding

answer

B

question

76. The botulinum known as botox toxin is an example of a a. endotoxin b. exotoxin c. viral byproduct d. endospore

answer

B

question

77. Which is (are) a reason for the decline of bed bugs observed in the 1950's a. better home construction b. improved disinfection methods c. improved bedding for mattresses d. the use of broad spectrum insecticides e. both a and d

answer

E

question

78. Which species is considered the bed bug. a. climax lectularius b. climax adjunctus

answer

A

question

79. How many eggs can a bed bug lay per day? a. 0 b. 1-12 c. 100-1000 d. 1000 and up

answer

B

question

80. Bed bug nymphs and adults can survive up to a year without food. a. true b. false

answer

A

question

81. Uroshiol is a ... a. toxic oil found in plant tissues b. toxin given off by bacterial spores c. toxin that is the byproduct of a virus d. the inner lining of the uterus

answer

A

question

82. Oogenesis results in a. three nonfunctional polar bodies b. 4 functional eggs c. one nonfunctional egg d. 3 functional eggs

answer

A

question

83. Stem Cells are ... a. nonfunctional cells b. undifferentiated cells c. cells that have been assigned to differentiate d. cells that can never change

answer

B

Bio 101 – Final Exam – Set 1 – Multiple Choice – Flashcards

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