BIO 3100 Test Banks (A collection of the most tested Questions with Verified Answers) LATEST VERSION 2022.
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BIO 3100 (BIO3100)
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Chamberlain College Of Nursing
BIO 3100 Test Banks BIO 3100 Lecture Exam I-A February 14, 2008 1. Universal features of all living cells include all of the following except: (a) nucleus or nucleoid (b) plasma membrane (c) cytoplasm (d) centrosome 2. An open system is one (a) that exchanges neither matter nor energy with its surr...
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Chamberlain College Of Nursing
BIO 3100 (BIO3100)
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BIO 3100
Lecture Exam I-A
February 14, 2008
1. Universal features of all living cells include all of the following except:
(a) nucleus or nucleoid
(b) plasma membrane
(c) cytoplasm
(d) centrosome
2. An open system is one
(a) that exchanges neither matter nor energy with its surroundings plasma
membrane
(b) that exchanges energy but not matter with its surroundings.
(c) that exchanges both matter and energy with its surroundings.
(d) that exchanges matter but not energy with its surroundings.
3. Which of the following is true about carbon bonding?
(a) Carbon-carbon double bonds have freedom of rotation.
(b) Carbon atoms can form covalent bonds with up to four other
atoms.
(c) Carbon can form double bonds with hydrogen.
(d) Carbon-carbon single bonds cannot rotate.
4.
Which of the following is true about the two molecules shown above?
(a) They are the isomers formed due to freedom of rotation about C=C
double bond.
(b) The carbon double bonds in each are chiral centers.
(c) They are the isomers formed due to rigidity of C=C double bond.
(d) They can be interconverted without breaking any covalent bonds.
5. . Prokaryotic and eukaryotic cells possess which of the following?
(a) Chloroplast
(b) a nuclear envelope
(c) mitochondria
(d) a plasma membrane
,6. If the free energy change DG for a reaction is -46.11 kJ/mol, the reaction
is:
(a) at equilibrium.
(b) endergonic.
(c) endothermic.
(d) exergonic.
(e) exothermic.
7. Exergonic and endergonic reactions differ in that
(a) exergonic reactions have a positive free energy change (D G is
positive) and endergonic reactions have a negative free energy
change (D G is negative).
(b) exergonic reactions require an input of energy and endergonic
reactions release free energy.
(c) exergonic reactions have a negative free energy change (D G is
negative) and endergonic reactions have a positive free energy
change (D G is positive).
(d) exergonic reactions consume more free energy than is released and
endergonic reactions release more free energy than is consumed.
8. Which of the following is true about stereoisomers?
(a) They have different configurations.
(b) They are indistinguishable by enzymes.
(c) The have different chemical bonds.
(d) They exist in equal amounts in living organisms.
9. Under what conditions is a carbon atom a chiral center?
(a) if it has no stereoisomers
(b) if it has only two different substituent groups
(c) if it is symmetric
(d) if it has four different substituent groups
10. Which of the following is true about hydrogen bonds?
(a) Hydrogen bonds are longer and stronger than covalent bonds.
(b) The geometry of a water molecule results in the equal sharing of
electrons between the hydrogen and oxygen.
(c) Hydrogen bonds must involve at least one water molecule.
(d) Polar molecules are soluble in water because they can form
hydrogen bonds with water molecules.
,11. What is the concentration of H+ in a pH 0 solution of acid?
(a) 0 M
(b) 1 M
(c) 1 X 10-7 M
(d) 1 X 10-14 M
12. Hydrophobic interactions are formed due to:
(a) the tendency of nonpolar groups to cluster together to avoid
water molecules
(b) the tendency of lipids to disperse in water.
(c) the tendency of polar groups to interact with each other
(d) all of the above
13. A buffer system consists of
(a) a weak acid and its conjugate base.
(b) a weak acid and a proton donor.
(c) a weak acid and a proton.
(d) a weak base and a proton acceptor.
14. Based on the Henderson-Hasselbalch equation (shown below), calculate
the pH when the ratio of acetic acid to acetate is 10 to 1 (the pKa of acetic
acid is 4.76).
(a) 1.00
(b) 3.76
(c) 4.76
(d) 5.76
15. Which of the following properties of water is due to the tendency of water
molecules to form H-bonds with each other:
(a) High boiling point
(b) High melting point
(c) High heat of vaporization
(d) All of the above
16. Which of the following is a weak interaction in aqueous systems:
(a) Covalent bond
(b) Van der Wall’s interaction
(c) Hydrophobic interaction
(d) H-bond
, (e) b, c and d
17. Van der Wall’s interactions are formed due to:
(a) Polarity of covalent bond
(b) Random, fluctuating distribution of electrons in an atom
(c) Tendency of hydrophobic groups to avoid water
(d) None of the above
18. Which of the following is true about pK:
(a) pK is the pH at which an acid or base is half dissociated
(b) pK is the pH at which a conjugate acid-base pair system exhibits
maximum buffering capacity
(c) All of the above
(d) None of the above
19. The relationship between pK and strength of an acid is:
(a) Higher the pK, stronger the acid
(b) Higher the pK, weaker the acid
(c) Lower the pK, weaker the acid
(d) pK is not correlated to strength of an acid
20. Which isomer of amino acids is present in biological systems:
(a) D-isomer
(b) L-isomer
(c) l-isomer
(d) d-isomer
21. Which of the following amino acid groups is hydrophilic:
(a) Alanine, proline, glycine
(b) Aspartic acid, serine, cysteine
(c) Leucine, proline, histidine
(d) Phenylalanine, tyrosine, tryptophan
22. At the center of all 20 standard amino acids is what is termed the a-
carbon that is covalently bonded with four other chemical groups. Which
of these four chemical groups is not a normal component of all amino
acids?
(a) an amino group
(b) a carboxyl group
(c) a side chain (R group)
(d) a methyl group
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