BIOL 1441 FINAL EXAM 2025
QUESTIONS AND ANSWERS
The element hydrogen consists of - ANS one electron and one proton
The element silicon has an atomic number of 14. Based on this information, which of the
following statements about an atom of silicon is Correct? - ANS it has 14 protons in its
nucleus
Two atoms share a pair of electrons equally. This means that they are joined by.... - ANS a
nonpolar covalent bond
Which of the following is TRUE about a reaction that is at chemical equilibrium? -
ANS Reactions are still occurring, but rates of reactions in both directions are equal
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,In liquid and frozen water, many or all molecules are joined by - ANS hydrogen bonds
between positively charged hydrogens of one molecules and negatively charged oxygens of
others
Cell membranes... - ANS are selectively permable
a calorie is - ANS the amount of heat required to change the temperature of one gram of
water by one degree celsius
Water can exist as a solid , liquid or gas and is the most abundant organic compound in living
organisms - ANS FALSE
which of the following would be least likely to dissolve in water? - ANS a large molecule
made up of entirely of carbon and hydrogen
which of the following elements make up the greatest part of the weight of a human? -
ANS oxygen
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, a hypothetical substance consists of sulfur, hydrogen, phosphorus,oxygen, nitrogen,copper, and
calcium. It has a molecular weight of 672. When you dissolve 14 grams of the substance in 120
mililiters of pure water, the result is a cloudy, bluish liquid with a slight green tinge. You
measure the pH of 50 ml of this solution and find that is 8.7 Based on this information the
mystery compound is: - ANS an inorganic base
Which of the following correctly describes the relationship between the hydrogen ion
concentration of solution A (pH=5) and solution B (pH=8)? - ANS a the hydrogen ion
concentration of solutin A is 1000 times that of solution B
Given an aqueous solution at room temperature in which the cocentration of hydroxide ion is
10^8 M the concentration of hydrogen ion will be - ANS 10^6
How many electrons does carbon have in its outermost shell ? - ANS 4
An enantiomer is a compound that has - ANS the same molecular formula as another
compound , but is structurally its mirror image
cholesterol - ANS maintains an appropriate level of fluidity in animal cell membranes
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QUESTIONS AND ANSWERS
The element hydrogen consists of - ANS one electron and one proton
The element silicon has an atomic number of 14. Based on this information, which of the
following statements about an atom of silicon is Correct? - ANS it has 14 protons in its
nucleus
Two atoms share a pair of electrons equally. This means that they are joined by.... - ANS a
nonpolar covalent bond
Which of the following is TRUE about a reaction that is at chemical equilibrium? -
ANS Reactions are still occurring, but rates of reactions in both directions are equal
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 1
,In liquid and frozen water, many or all molecules are joined by - ANS hydrogen bonds
between positively charged hydrogens of one molecules and negatively charged oxygens of
others
Cell membranes... - ANS are selectively permable
a calorie is - ANS the amount of heat required to change the temperature of one gram of
water by one degree celsius
Water can exist as a solid , liquid or gas and is the most abundant organic compound in living
organisms - ANS FALSE
which of the following would be least likely to dissolve in water? - ANS a large molecule
made up of entirely of carbon and hydrogen
which of the following elements make up the greatest part of the weight of a human? -
ANS oxygen
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 2
, a hypothetical substance consists of sulfur, hydrogen, phosphorus,oxygen, nitrogen,copper, and
calcium. It has a molecular weight of 672. When you dissolve 14 grams of the substance in 120
mililiters of pure water, the result is a cloudy, bluish liquid with a slight green tinge. You
measure the pH of 50 ml of this solution and find that is 8.7 Based on this information the
mystery compound is: - ANS an inorganic base
Which of the following correctly describes the relationship between the hydrogen ion
concentration of solution A (pH=5) and solution B (pH=8)? - ANS a the hydrogen ion
concentration of solutin A is 1000 times that of solution B
Given an aqueous solution at room temperature in which the cocentration of hydroxide ion is
10^8 M the concentration of hydrogen ion will be - ANS 10^6
How many electrons does carbon have in its outermost shell ? - ANS 4
An enantiomer is a compound that has - ANS the same molecular formula as another
compound , but is structurally its mirror image
cholesterol - ANS maintains an appropriate level of fluidity in animal cell membranes
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 3
