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
D. consistency
Er- can you do ALL of the questions I put, please?
Apologies for the confusion. Here are the complete answers to all of the questions you provided:
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.
1. The correct answer is D. The outermost shell of carbon can form up to four covalent bonds, making it capable of bonding with multiple other atoms.
2. The correct answer is D. A hydrocarbon is a large chain of carbons and hydrogens bonded together.
3. The correct answer is C. Amino acids, fatty acids, and sugars (monosaccharides) are all made of carbon, oxygen, and hydrogen.
4. The correct answer is A. Amino acids are unique from one another based on their R group, which can vary among different amino acids.
5. The correct answer is C. Starch is a carbohydrate, while protein, amino acid, and nucleotide are not.
6. The correct answer is D. Amino acid contains nitrogen, while starch, glucose, and water do not.
7. The correct answer is B. The equation 6H2O + 6CO2 -> C6H12O6 + 6O2 best represents conservation of matter since the number of atoms of each element on both sides of the equation is balanced.
8. The correct answer is D. Reactants in a chemical reaction are the inputs or substances that are present before the reaction takes place.
9. The correct answer is B. During a chemical reaction, the total number of atoms stays the same. Atoms are rearranged but not created or destroyed.
10. The correct answer is B. The stomach can be best compared to the mitochondria because it breaks down nutrients and releases energy for the body, similar to how the mitochondria generate energy for the cell.
11. The correct answer is D. Reliability refers to consistency or the ability to produce the same results or outcomes consistently. It is not directly related to relevancy, professionalism, or elegance.