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BIOS 100 Exam 2
- Which of the following questions about science is FALSE?
- Hypotheses can be tested
- An experiment can prove your hypothesis to be true
- Theories and hypothesis can be modified over time
- Data collection is an important component of science
E. All of the above statements about science are TRUE:
Answer B.
- What is the difference between 14C and 14N?
A.The number of protons B. The number of electrons C.The number of neutrons D. All of the
above:
Answer D.
- If NaCl is placed in water, what will happen?
- The ionic bond will hold and the salt will not dissolve
- The salt will dissolve and the Cl- will be surrounded by the oxygen-end of water
- The salt will dissolve and the Cl- will be surrounded by the hydrogen-end of water
- The Na+ and Cl- will become liquid, but still be strongly attracted to each other
E. None of the above:
Answer C.
- Which of the following molecules do you think is the most hydrophobic?
A. H2O B. C6H12O6 C. Na+ D. C8H18 E. A & C:
Answer D.
- Which of the following statements about water is FALSE?
- Water is easy to heat up and loses heat rapidly
- Water has high surface tension
- Water has high cohesive and adhesive properties
- Water has a very high boiling point when compared to molecules of equal size
E. All of the above statements about water are TRUE:
Answer A.
- What is the pH of pure water? 1 / 3
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A. 0.0 B. 3.5 C. 7.0 D. 10.5 E. Impossible to tell:
Answer C.
- When paper (C6H12O6) is burned and converted to CO2 and water, we say that the
carbon in the paper has been:
A. Oxidized B. Reduced:
Answer A.
- When proteins are broken down to amino acids in your stomach and small intestine, we
would say that the protein has been:
A. Condensed B. Hydrolyzed:
Answer B.
- Which of the following molecules has the most energy per gram?
A. Polysaccharides B. Lipids C. Proteins D. Nucleic Acids:
Answer B.
10. The picture to the right is and example of a:
A. Polysaccharide B. Lipid C. Protein D. Nucleic Acids:
Answer A.
- Which of the molecules listed below is strongly amphiphatic?
A. Sugar (C6H12O6) B. Water C. Phospholipid D. Na+ E. None of the above:
Answer C.
12. A peptide bond joins two:
- Monosaccharides B. Amino acids C. Phosphoplipids D. Nucleic acids E. None of the above:
- The microfilaments comprising the cytoskeleton are composed of thousands of
- Primary B. Secondary C.Tertiary D. Quaternary: 2 / 3
Answer B.
individual actin subunits joined together. This is an example of protein structure.
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Answer D.
14. Cell membrane integral proteins typically have:
- Alpha-helices with hydrophobic -R groups
- Simple tertiary structures
- Polysaccharide units associated with the proteins
- Liposomes
E. None of the above:
Answer A.
- Which of the following statements about cells is FALSE?
- All cells arise from other cells
- All cells acquire and utilize energy
- All cells contain a plasma membrane and cytoplasm
- All cells can engage in mechanical activity
E. All of the above statements about cells are TRUE:
Answer E.
- Which of the following statements about cells is FALSE?
- Prokaryotic cells were the first to evolve
- Eukaryotic cells are generally the largest and most complex cell types
- Today, most Archaeans live in extreme environments
- Prokaryotic cells have the most diverse morphologies
E. All of the above statements about cells are TRUE:
Answer D.
- Which of the following would you not expect to find in a prokaryotic cell?
- Plasma membrane composed of phospholipids and proteins
- Nuclear material in the form of DNA
- Ribosomes
- Rough endoplasmic reticulum
E. All of the above are found in prokaryotic cells:
Answer D.
18. Animal lack which of the following:
- Nuclear membrane B. Central vacuole C. Ribosomes D. Mitochondria E. None of the above:
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Answer B.