1. What is the significance of carbon having four valence electrons?
A. The outermost shell never fills making it unstable.
B. The outermost shell can only bond with hydrogen.
C. The outermost shell is full, making it a stable.
D. The outermost shell can form up to four covalent bonds.
2. What is the definition of a hydrocarbon?
A. large molecules that are produced by living things
B. a single line bonding carbon and hydrogen
C. electrons shared between two different atoms
D. a large chain of carbons and hydrogens bonded together
3. What do amino acids, fatty acids, and sugars (monosaccharides) have in common?
A. They are used to make proteins.
B. They are made of carbon, oxygen, and nitrogen.
C. They are made of carbon, oxygen, and hydrogen.
D. They are used to make lipids.
4. What makes amino acids unique from one another?
A. The R group
B. The carboxyl group
C. the amino group
D. the long strands of glucose molecules
5. Which compound is a carbohydrate?
A. Protein
B. amino acid
C. starch
D. nucleotide
6. Which compound contains nitrogen?
A. starch
B. glucose
C. water
D. amino acid
7. Which equation best represents conservation of matter?
A. 3H2O + 3CO2 -> C6H12O6 + 6O2
B. 6H2O + 6CO2 -> C6H12O6 + 6O2
C. 6H2O + 6CO2 -> C3H6O3 + 3O2
D. 6H2O + 10CO2 -> C6H12O6 + 4O2
8. What are reactants in a chemical reaction?
A. outputs
B. substances that are formed by reactions
C. substances that speed up reactions
D. inputs
9. During a chemical reaction, the number of atoms
A. fluctuates
B. stays the same
C. increases
D. decreases
10. A large portion of cellular respiration happens in the mitochondria. For this reason, the mitochondria are known colloquially as the “powerhouses of the cell.” Which body organ could best be compared to the mitochondria?
A. the lungs because they add oxygen to the body
B. the stomach because it breaks down nutrients and releases energy for the body
C. the heart because it pumps nutrients around the body
D. the brain because it controls the body
11. Reliability refers to
A. relevancy
B. professionalism
C. elegance
D. consistency
3 answers
1. The significance of carbon having four valence electrons is:
D. The outermost shell can form up to four covalent bonds.
2. The definition of a hydrocarbon is:
D. A large chain of carbons and hydrogens bonded together.
3. Amino acids, fatty acids, and sugars (monosaccharides) have in common that:
C. They are made of carbon, oxygen, and hydrogen.
4. What makes amino acids unique from one another is:
A. The R group.
5. The compound that is a carbohydrate is:
C. Starch.
6. The compound that contains nitrogen is:
D. Amino acid.
7. The equation that best represents conservation of matter is:
B. 6H2O + 6CO2 -> C6H12O6 + 6O2.
8. Reactants in a chemical reaction are:
D. Inputs.
9. During a chemical reaction, the number of atoms:
B. Stays the same.
10. The body organ that could best be compared to the mitochondria is:
B. The stomach because it breaks down nutrients and releases energy for the body.
11. Reliability refers to:
D. Consistency.
47 answers