Well there is a Unit 2 test on Wednesday (yikes) so here are some multiple choice questions to help you review!
1. How do isotopes differ from each other?
a) ability to form ions
b) number of protons
c) number of valence electron
d) number of electrons
e) number of neutrons
2. Oxygen has an atomic number of 8. Therefore, it must have
a) 8 protons
b) 8 electrons
c) 16 neutrons
d) Only A and B
e) A, B, and C
3. Which of the following is a trace elements that is essential to living organisms?
4. The mass number can be approximated by adding together the number of
a) neutrons and electrons
b) protons and neutrons
c) protons and electrons
e) isotopes of the atom
5. Which four elements make up approximately 96% of living matter?
a) carbon, oxygen, sulfur, calcium
b) carbon, sulfur, phosphorus, hydrogen
c) oxygen, hydrogen, calcium, sodium
d) carbon, sodium, chlorine, magnesium
e) carbon, hydrogen, nitrogen, oxygen
ANSWERS: E, D, E, B, E
1. How many electron pairs does carbon share to full its outter shell?
2. What type of bonds does carbon form?
d) only A and B
e) A, B, and C are correct
3. Why are hydrocarbons not soluble in water?
a) they are hydrophilic
b) the C-H bond is nonpolar
c) they are less dense than water
d) the C-H bond is polar
e) they are large molecules
4. What is true about geometric isomers?
a) they are variations in arrangement around a double bond
b) they are mirror images
c) they have different molecular formulas
d) they have the same chemical properties
e) their atoms and bonds are arranged in different sequences
5. Organic chemistry is the study of
c) all matter
d) carbon compounds
e) functional groups
ANSWERS: D, B, B, A, D
1. Carbohydrates function in animal as
b) functional units of lipids
c) sites of protein synthesis
d) enzymes in the regulation of metabolic processes
e) a component of triglycerides
2. Amino Acids differ because of their
a) amino group
b) R group
c) tertiary structure
d) carboxyl groups
e) A and B are correct
3. Which of the following are polysaccharides?
a) glycogen and starch
b) glucose and sucrose
c) uracil and thymine
d) RNA and DNA
e) cholesterol and triacylglycerol
4. Which of the following is true of start and cellulose?
a) They can both be digested by humans
b) they are both structural components of the plant cell wall
c) They are geometric isomers
d) they are both polymers of glucose
e) they are both used for energy storage in plants
5. Which of the following lipids is most important in the cell membrane?
ANSWERS: A, B, A, D, E
1. Which term describes the process of breaking down large molecules into smaller ones?
2. Which is true about catabolic pathways?
a) they consume energy to build up polymers from monomers
b) they do not depend on enzymes
c) they release energy as they degrade polymers to monomers
d) they lead to syntheses of catabolic compounds
e) A and B are correct
3. Anabolic pathways
a) release energy as they degrade polymers to monomers
b) do not depend on enzymes
c) depend on enzymes
d) consumes energy to build up polymers from monomers
e) B and C are correct
4. The transfer of free energy from catabolic pathways to anabolic pathways is best called
d) feedback regulation
e) energy coupling
5. Which of the following would decrease the entropy within a system?
b) dehydration reactions
ANSWERS: A, C, E, E, B
Great! well I hope that mini test helps you study!
MISS AND LOVE YOU ALL!!!!