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BIOS 260 - Quiz 1 & 2Questions and Answers
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BIOS 260 - Quiz 1 & 2Questions and Answers
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BIOS 260 - Quiz 1 & 2Questions and AnswersWhat is the main, general purpose of negative feedback? Correct Ans-to maintain
homeostasis
Which of the following are functional characteristic of life? (Select all that apply) Correct
Ans-- movement
- maintenance of boundaries
- responsiveness to external stimuli
The numbers listed represent the number of electrons in the first, second, and third energy
levels, respectively. On this basis, which of the following is an unstable or reactive atom
Correct Ans-2, 8, 1
A bond in which electrons are completely lost or gained by the atoms involved Correct
Ans-Ionic bond
First one or two letters of an element's name is the __________. Correct Ans-Atomic
symbol
, BIOS 260 - Quiz 1 & 2Questions and Answers
Isotopes differ from each other only in the number of electrons the atom contains. Correct
Ans-False
A dipeptide can be broken into two amino acids by dehydration synthesis. Correct Ans-
False
Which of the following is are true of proteins? (Select all that apply) Correct Ans-- Their
function depends on their three-dimensional shape.
- They have both functional and structural roles in the body.
- They may be denatured or coagulated by heat or acidity.
Carbohydrates are stored in the liver and muscles in the form of ________. Correct Ans-
glycogen
Which of the following does NOT describe enzymes? Correct Ans-Enzymes work by raising
the energy of activation.
, BIOS 260 - Quiz 1 & 2Questions and Answers
A chemical reaction in which bonds are broken is usually associated with ________.
Correct Ans-the release of energy
What level of protein synthesis is represented by the coiling of the protein chain backbone
into an alpha helix? Correct Ans-secondary structure
The four elements that make up about 96% of body matter are ________. Correct Ans-
carbon, oxygen, hydrogen, nitrogen
If atom X has an atomic number of 74 it would have which of the following? Correct Ans-
74 protons
The chemical symbol O=O means ________. Correct Ans-the atoms are double bonded
This is the site where proteins are packaged for insertion in the cell membrane or for
exocytosis. Correct Ans-E (golgi apparatus)
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