Bio 105 Sample of exam questions with answers new exam docs

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Bio 105 Sample of exam questions with answers new exam docs 1. Homeopathy and acupuncture a. are not science-based b. are based on known scientific principles c. are based on old ideas which h... ave not been experimentally supported d. both a and c are correct 2. Dr. William Harvey discovered that blood circulated in the body. Approximately when did he make this discovery? a. during the ancient Greek civilization b. during the scientific revolution c. during the American revolution d. during the twentieth century 3. Peer review a. is a mechanism of distributing funding to deserving scientists b. is a way to explain scientific results in an understandable way to laymen c. is a method to ensure high quality in scientific work and publications d. is how scientists are hired 4. A scientific hypothesis is a. an opinion b. a testable explanation for an observation c. a fact d. easily proved true 5. When scientists carry out an experiment, they are testing a(n) a. theory b. control c. hypothesis d. variable 6. What is the purpose of an experimental control? a. to prevent changes from occurring during an experiment b. to make sure the experiment comes out the way it should c. to test the effects of changing one variable while keeping other variables the same d. to demonstrate in what way the experiment was performed incorrectly 7. Dr. Patel wants to test his hypothesis that consumption of glucosamine sulfate reduces joint pain. Which experimental design will give him the best data? a. He solicits ten volunteers from the hospital staff and asks which individuals want to be in the control group. b. The women who volunteer to participate in the study are assigned to the control group, and the men who volunteer are placed in the experimental group. c. He selects older individuals from the pool of volunteers, since they experience more joint pain. d. He asks for volunteers among the hospital staff and chooses who will be in the control group by asking everyone to draw from a deck of numbered cards. 8. In an experiment designed to measure the distance a golf ball is hit by clubs made of different materials, the independent variable is a. how far the golf ball travels b. the type of material the club is made of c. the wind direction when the experiment takes place d. the type of material the golf ball is made of 9. In an experimental procedure, which is the response, or outcome measured by the investigator? a. the standardized variable b. the dependent variable c. the independent variable d. the control variable 10. Correlations are less convincing than controlled experimental results because correlations a. do not eliminate as many alternative hypotheses as experimental results b. are subject to greater bias than experimental results c. cannot be observed outside the laboratory d. cannot be statistically significant 11. People who reject genetically modified foods on principle without understanding their pros and cons are committing a type of a. ad hominin fallacy b. argument from ignorance c. naturalistic fallacy d. confirmation-bias fallacy 12. Describing a person as having phenylketonuria (PKU) is to indicate his or her a. genetic code b. genotype c. karyotype d. phenotype 13. Which of the following represents a heterozygous genotype? a. ABCD b. AABB c. AB d. AaBb 14. Alleles are different forms of the same a. gene b. genome c. chromosome d. chromatid 15. If two people are the parents of a child with (autosomal recessive) Tay-Sachs disease, what is the probability that their next child will also have Tay-Sachs disease? a. 0% b. 100% c. 50% d. 25% 16. What phenotype ratio would be expected in the offspring of a cross between two dogs, both heterozygous for a gene? a. 1:1 b. 3:1 c. 9:3:3:1 d. 1:2:1 17. If one parent has A blood type and the other has O, what types of children could they have? a. A, B, or O b. A or O c. O only d. A only 18. If most people in a certain ethnic group show a particular phenotype, you can conclude that a. the allele causing that phenotype is most likely recessive b. the phenotype is most likely due to the heterozygous condition c. the allele causing that phenotype is most likely dominant d. you can’t tell whether the allele causing that phenotype is dominant or recessive 19. Alvin has free earlobes (caused by a dominant gene) and is unable to taste PTC (the ability to taste is dominant). Alvin's father had attached earlobes and could taste PTC. Alvin marries Haruka who has attached earlobes and is a heterozygous taster. What types of children could they have? a. 1/4 free earlobes, taster; 1/4 free earlobes, non-taster; 1/4 attached earlobes, taster; 1/4 attached earlobes, non-taster b. 1/2 free earlobes, taster; 1/2 attached earlobes, taster c. 100% free earlobes, taster d. 9/16 free earlobes, taster; 3/16 free earlobes, non-taster; 3/16 attached earlobes, taster; 1/16 attached earlobes, non-taster 20. An individual has the genotype Aa. What kind(s) of gametes could this individual form? a. all would be Aa b. half would be A and half would be a c. All would be A since A is dominant d. 1/4 AA, 1/2 Aa, and 1/4 aa 21. In dogs, dark coat color (D) is dominant over albino (d), and short hair (S) is dominant over long hair (s). Which cross below is most likely to represent the parents that produced this set of puppies? number of puppies of each type dark, dark, albino, albino, parents short long short long dark, short X dark, short 6 0 0 0 a. DdSS X DDSs b. DdSs X DdSs c. DdSs X ddSS d. DDSs X DDSs 22. Which is much more likely to be influenced by the environment? a. phenotype b. genotype c. karyotype d. genotype and phenotype are equally likely to be influenced by the environment 23. Human skin color is a polygenic trait. The more dominant alleles a person has, the darker their skin color is. If two people both with the genotype AaBbCc married, their children would be: a. all dark skinned b. all light skinned c. all medium skinned d. anywhere along the continuum of skin color 24. Which is true concerning monozygotic (identical) twins? a. they from the same sperm fertilizing two different eggs b. they came from the same egg and sperm c. they came from the same egg, but different sperm d. they from two different sperm fertilizing two different eggs 25. Refer to the pedigree below. Miguel and his Uncle Juan have hemophilia. None of the other members of their family have hemophilia. Which other members of the family must be carriers of the X-linked disease hemophilia? a. Beatrice, Marie and Fran b. all of the female family members c. Beatrice and Marie d. only Beatrice 26. Defective dentine (outer surface of teeth) is a dominant sex-linked trait. A woman with normal teeth marries a man with bad teeth. What kinds of children could they expect? a. ½ affected boys, ½ carrier girls b. ½ affected boys, ½ normal girls c. ¼ affected girls, ¼ affected boys, ¼ carrier girls, ¼ normal boys d. ½ affected girls, ½ normal boys 27. All of the genes on the same chromosome form a a. bundle b. linkage group c. genome d. phenotype 28. Chromosomal problems in the offspring are most closely associated with which type of parent? a. a younger father b. an older mother c. a younger mother d. an older father 29. Which type of people always have bodies made up of two genetically different types of cells with respect to X chromosomes? a. women b. men c. neither d. both 30. A human conception with which of the following chromosomal abnormalities will never develop into a viable embryo? a. XYY b. YO (Y and no other sex chromosome) c. XXY d. XO (X and no other sex chromosome) 31. Which chromosomal condition causes the least serious genetic results? a. one X and two Y’s b. 3 copies of chromosome 13 c. 3 copies of X chromosome d. one X, no other sex chromosome 32. A human sperm cell receives 22 autosomes and a. an X chromosome always b. either an X or a Y chromosome c. both an X and a Y chromosome d. a Y chromosome always 33. DNA consists of repeating units known as a. dipeptides b. nucleotides c. amino acids d. sugars 34. If the one side of a DNA molecule read ATATGG, the other side would be a. AUAUGG b. ATATGG c. UAUACC d. TATACC 35. To what does the phrase ‘ladder-like appearance’ refer when considering the structure of DNA? a. complementary base pairing b. the complementary base pairs as rungs and the sugar phosphate backbone as the rails c. each gene is like a rung on the ladder d. the fact that each individual nucleotide resembles a ladder 36. Which is not a part of DNA replication? a. a double-stranded molecule unwinds b. nitrogenous base pairs are formed c. ribosomes are synthesized d. all of these are part of DNA replication 37. Exposure of harmless R type bacteria to the DNA of lethal S type bacteria can a. kill the R cells b. none of these c. change the R cells into S cells d. change the S cells into R cells 38. The injured soldier is the child of which pair of parents? a. C and D b. G and H c. A and B d. E and F 39. Which is true of DNA “words” (codons)? a. none of these are true b. they are all 3 letters long c. only certain combinations of letters carry information d. they can be any length 40. In the process of transcription a. DNA is not used b. messenger RNA is synthesized c. DNA is used to make more DNA d. messenger RNA and transfer RNA are used to make a protein sequence 41. Translation results in the production of a. protein b. DNA c. amino acids d. RNA 42. Which nucleotide base may be found in an RNA molecule but not a DNA molecule? a. U b. T c. G d. A 43. A cell can correctly read and translate genes from a. itself only b. another cell from the same species c. any other cell in the world d. other cells in the same body 44. Which is the correct order of events during gene expression? a. DNA is used to make protein, which is used to make RNA b. DNA is used to make RNA, which is used to make protein c. RNA is used to make protein, which is used to make DNA d. Protein is used to make DNA, which is used to make RNA 45. Which of the following are possible results of a change in the genetic material? a. no change in the organism b. a genetic disease c. an altered phenotype d. all are possible 46. If one nucleotide is accidentally changed for another, it causes a a. frameshift mutation b. point mutation c. inversion d. none of these 47. Amino acids are found in _______; while __________ make up the DNA. a. proteins; phosphates b. nucleotide bases; proteins c. proteins; nucleotide bases d. phosphates; nucleotide bases 48. The purpose of gel electrophoresis is to a. create many copies of a piece of DNA b. cut DNA at specific sequences c. separate DNA fragments by size d. create recombinant DNA molecules [Show More]

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