Biology

24. If the results of an experiment turn out differently from what you expected, then:

A. The experiment was a failure.

B. You should explore the possible reasons for this in the ‘conclusions’ section of your experimental write-up.

C. You need to redo your experiment until you get the expected result.

D. You didn’t follow the scientific method.

25. Which of the following is NOT a type of passive transport?

A. Diffusion

B. Osmosis

C. Endocytosis

D. Facilitated diffusion

26. Chamber A contains 40% helium and Chamber B contains 20% helium. Chambers are connected by a tube the molecules are free to cross. Which of the following will occur?

A. Some helium will move from chamber A to chamber B

B. Some helium will move from chamber B to chamber A

C. Helium will remain concentrated in chamber A

D. All of the helium will move into chamber B

27. What will happen to an animal cell placed in a salt water solution?

A. The cell will shrink

B. The cell will expand

C. The cell will burst

D. The cell will shrink and then expand and then shrink again

28. An animal cell placed in a hypotonic solution will:

A. Die

B. Take on water

C. Lose water

D. Divide

29. Which of the following is a type of active transport?

A. Sodium potassium pump

B. Endocytosis

C. Exocytosis

D. All of these

30. Active transport requires:

A. A concentration gradient

B. Osmosis

C. Energy

D. A hypertonic solution

31. The scientific discipline that investigates the body’s structure and shape is calleD.

A. Anatomy.

B. Embryology.

C. Endocrinology.

D. Histology.

E. Physiology.

32. Select the correct statement concerning the tissue level.

A. Tissues consist of groups of similar cells that have a common function.

B. The four basic tissue types (epithelial, connective, muscular, and neural) play a definite but different role in the body.

C. Two or more tissue types that performs a specific function for the body constitutes an organ

D. All of the above

33. The sum of all chemical reactions in the body is termed.

A. Homeostasis

B. Physiology

C. Dynamic feedback

D. Metabolism

34. A structure composed of two or more tissues is termed.

A. Organ

B. Serous membrane

C. Complex tissue

D. Organ system

35. The “basic unit of life” is:

A. The atom

B. Water

C. The cell

D. The chemical level of organization

36 . A group of cells of the same type form a(n):

A. Organ.

B. Organism.

C. Atom.

D. Tissue.

E. Organ system.

37. Which of the following best illustrates the increasing levels of complexity?

(1) Cells; (2) Organs; (3) Organelles; (4) Organism; (5) Tissues; (6) Organ systems

A. 1, 2, 3, 4, 5, 6.

B. 2, 4, 3, 5, 1, 6.

C. 4, 3, 5, 6, 1, 2.

D. 3, 1, 5, 2, 6, 4.

E. 1, 5, 3, 2, 6, 4.

38. Which of the statements below is untrue with respect to organ systems?

A. They can share organs with other systems.

B. They function together to ensure wellness of the organism.

C. They act independently of each other.

D. They are groups of organs with a common function.

39. Which of the following is NOT a necessary life function?

A. Maintaining boundaries.

B. Movement.

C. Thinking.

D. Responsiveness.

E. Reproduction.

40. The polymerase chain reaction (PCR) is used

A. To produce large numbers of identical DNA segments called gene probes.

B. Increase the amount of DNA to be searched in DNA sequencing procedures

C In water-quality tests

D. In HIV and HPV detection

E. To identify even poorly growing bacterial cultures

F. In all of the above

41 Which of the statements below are false with respect to gene probe technology?

A. Since first introduced in the 1970s, gene probe tests have been met only with periods of unbridled enthusiasm.

B.The ViraPap test is a commercially available gene probe test for detecting human papilloma virus (HPV), the virus that causes genital warts.

C. A similar technique can be used to conduct water-quality tests based on the detection of coliform bacteria such as E. coli

D. gene probes and PCR have been useful is in the detection of human immunodeficiency virus (H1V).

E. None of the above

42. When gene probe analysis becomes more widely accepted it will allow the identification of

A. Salmonella,

B. Shigella

C. Vibrio .

D. All of the above

43. Gene probe technology

A Is described as “exquisitely accurate”

B. Have a high degree of discrimination and reliability as strong as older identification methods.

C Allows one to get a result in a few short hours instead of many days

D. Is extremely sensitive

E. All of the above

44. Gene probe assays are widely available in kit forms for a variety of bacterial species except

A. Staphylococci

B. Haemophilus

C. Listeria

D Mycobacterium, and Neisseria

E Fungi (such as Blastomyces, Coccidioidesand Histoplasma).

45. The future value of gene probes will depend in part on

A. The development of ways to minimize false-positive reactions due to contamination

B. Methods of increasing the sensitivity of tests

C. On mechanisms for enhancing the signals from probes bound to their target molecules.

D. All of the above

E A & C only

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46. With respect to interpreting BLAST search results, when you do a BLAST search BLAST will come back with a result, that includes

A. The reference of the search program

B. The number of letters in your sequence C. The number of letters in the database D. A graphic representation of the sequence matches E. A list of matches sorted with the best matching sequences shown first F. All of the above

G. A, C & E only

47. In interpreting BLAST results select the answer below that is false.

A. If BLAST returns an E-value that is very small or close to zero, then you probably have a meaningful match that is not due to random chance. B. Since each match therefore contains 2 bits of information (and only 1 is correct out of 4 possibles), then the higher the score, the better is the match.

C. To interpret the matches, you therefore need to pay attention to whether the E-value is reasonably small

D. Two or more sequences may match extremely well but appear to belong to completely different species. E. None of the above

48. The process by which energy is obtained directly from sunlight and stored in organic compounds is called…

A. Transpiration

B. Photosynthesis

C. Accessory pigmentation

D. Respiration

E. Crassulacean acid metabolism

49. Organisms that manufacture their own food from inorganic substances and energy (photosynthesize and/or chemosythesize) are called…

A. Heterotrophs

B. Protists

C. Tertiary consumers

D. Autotrophs

E. Fungi

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