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BIOS 100 Chapter 2 Answer and Questions
1. Which trait is NOT a functional characteristic of all living things?:
A.) senseand respond to stimuli B.) acquire and consume energy C.) maintain homeostasis D.) grow and reproduce E.) protect self from predators
Answer E
- One argument explaining why viruses are not living is that viruses dependon the cells of
other living creatures in order to multiply.Which characteristicsof life does this argument use?
Select the TWO answers that are correct.:
A.) homeostasis B.) respond to stimuli C.) growth D.)reproduction E.) use energy
Answer C,D
- What characteristics make a particular molecule organic? Select the TWOanswers that are
correct.:
A.) a carbon backbone B.) presence of carbon C.) a carbon-oxygen bond D.) a carbon-nitrogen bond E.) a carbon-hydrogen bond
Answer A,E
- What determines the identity of a particular atom? Select the TWO answersthat are correct.:
A.) total number of neutrons in orbitals B.) total number of electrons in orbitals C.) number of electrons in the inner most energy shell D.) number of protons and number of neutrons in the nucleusE.) number of protons in the outermost energy shell
Answer B,D
- Where are the protons, neutrons, and electrons located in an atom?: 1 / 2
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A.) Electrons and neutrons are located in orbitals, and protons are located in the nucleus.B.) Protons, electrons, and neutrons are located in the nucleus, and energy islocated in orbitals.C.) Protons and neutrons are located in the nucleus, and electrons are located inorbitals.D.) Electrons and neutrons are located in the nucleus, and protons are located inorbitals.E.) Protons and electrons are located in the nucleus, and neutrons are located inorbitals.
Answer C
6. Which part of an atom forms covalent bonds with other atoms?:
A.) electronsin the innermost energy shell B.) neutrons in the outermost energy shell C.) electrons in the outermost energy shell D.) protons in the outermost energy shell E.) protons in the innermost energy shell
Answer C
- How do RNA and DNA molecules differ? Select the TWO answers that arecorrect.:
A.) Adenine is used in RNA, whereas cytosine is used in DNA.B.) Uracil is used in RNA, whereas thymine is used in DNA.C.) RNA has one fatty acid chain, whereas DNA has two of them.D.) RNA contains sugars in its backbone, whereas DNA does not.E.) RNA is single-stranded, whereas DNA is double-stranded.
Answer B,E
- How do triglycerides and phospholipids differ? Select the TWO answersthat are
correct.:
A.) Phospholipids store energy, whereas triglycerides are cellmembrane components.B.) Phospholipids are saturated with hydrogens, whereas triglycerides are unsatu-rated.C.) Phospholipids have ribose in place of the deoxyribose used in triglycerides.D.) Phospholipids have two fatty acid tails, whereas triglycerides have three.E.) Phospholipids have a hydrophilic phosphate group in place of one fatty acid tail.
Answer D,E
- Why is the phospholipid bilayer important to cell survival? Select the TWOanswers that
are correct.:
A.) It maintains homeostasis by forming an insulating layer around the cell.B.) It separates the cellular environment from the external environment.C.) It blocks small, nonpolar molecules from entering the cell and harming it.
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