Bio 210 Lecture Exam 1 Questions
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1. What are the 4 most common elements in the human body?
A) Carbon, calcium, iron, oxygen
B) Nitrogen, hydrogen, oxygen, carbon
C) Sodium, potassium, carbon, oxygen
D) Hydrogen, helium, carbon, nitrogen
Answer: B) Nitrogen, hydrogen, oxygen, carbon
2. What is an acid?
A) A proton acceptor
B) A substance that neutralizes bases
C) A proton donor
D) A molecule that releases OH- ions
Answer: C) A proton donor
3. How are acids neutralized?
A) By adding water
B) By adding another acid
C) By adding a base
D) By lowering the temperature
Answer: C) By adding a base
4. What do active processes of membrane transport require?
A) Water
B) Energy
C) Oxygen
D) Enzymes
Answer: B) Energy
5. What is active transport?
A) Movement of a substance to decrease the concentration gradient
B) Movement of water through a permeable membrane
C) Movement of a substance to increase the concentration gradient
D) Random movement of molecules in a solution
Answer: C) Movement of a substance to increase the concentration gradient
6. What are adenine and guanine classified as?
,A) Pyrimidines
B) Amino acids
C) Purines
D) Nucleotides
Answer: C) Purines
7. What is Adenosine Triphosphate (ATP)?
A) A protein that carries oxygen in the blood
B) The central molecule in chemical energy transfer within cells that releases energy
when broken
C) A lipid that stores long-term energy
D) A nucleic acid that stores genetic information
Answer: B) The central molecule in chemical energy transfer within cells that
releases energy when broken
8. How many amino acids are there in total, and how are they linked?
A) 15 total, linked by hydrogen bonds
B) 20 total, linked by peptide bonds
C) 25 total, linked by ionic bonds
D) 20 total, linked by covalent bonds
Answer: B) 20 total, linked by peptide bonds
9. When an acid dissociates in water, what does it produce?
A) OH- and a cation
B) H+ and a cation
C) H+ and an anion
D) OH- and an anion
Answer: C) H+ and an anion
10. What does Anatomy study?
A) The function of living organisms and their parts
B) The form and structure of the body
C) The chemical reactions within cells
D) The development of organisms from conception to birth
Answer: B) The form and structure of the body
11. What is the function of anchoring sites on the plasma membrane?
A) Bind ligand receptors on another cell
B) Communicate to other cells
C) Secure the cytoskeleton to the plasma membrane
D) Perform cell to cell attachments
Answer: C) Secure the cytoskeleton to the plasma membrane
12. What are anions?
, A) Ions with a positive charge that lose an electron
B) Ions with a negative charge that gain an electron
C) Neutral atoms with no charge
D) Atoms that share electrons with other atoms
Answer: B) Ions with a negative charge that gain an electron
13. What is an atom?
A) The largest particle that exhibits chemical properties of an element
B) A group of atoms with a positive or negative charge
C) The smallest particle that exhibits the chemical properties of an element
D) Two or more elements combined in a fixed ratio
Answer: C) The smallest particle that exhibits the chemical properties of an element
14. What three subatomic particles compose atoms?
A) Protons (+), electrons (-), and photons
B) Neutrons, electrons (-), and positrons
C) Protons (+), neutrons, and electrons (-)
D) Protons (+), neutrons, and photons
Answer: C) Protons (+), neutrons, and electrons (-)
15. Atoms with five, six, or seven electrons in their valence shell become what?
A) Cations
B) Isotopes
C) Neutral atoms
D) Anions
Answer: D) Anions
16. Atoms with one, two, or three electrons in their valence shell become what?
A) Anions
B) Cations
C) Isotopes
D) Neutral compounds
Answer: B) Cations
17. What is a base?
A) A proton donor
B) A substance that releases H+ ions
C) A substance that accepts H+ when added to a solution
D) A molecule that lowers pH
Answer: C) A substance that accepts H+ when added to a solution
18. What is another name for a base?
A) Proton donor
B) Proton acceptor
with correct Answers ()
|100% Verified
1. What are the 4 most common elements in the human body?
A) Carbon, calcium, iron, oxygen
B) Nitrogen, hydrogen, oxygen, carbon
C) Sodium, potassium, carbon, oxygen
D) Hydrogen, helium, carbon, nitrogen
Answer: B) Nitrogen, hydrogen, oxygen, carbon
2. What is an acid?
A) A proton acceptor
B) A substance that neutralizes bases
C) A proton donor
D) A molecule that releases OH- ions
Answer: C) A proton donor
3. How are acids neutralized?
A) By adding water
B) By adding another acid
C) By adding a base
D) By lowering the temperature
Answer: C) By adding a base
4. What do active processes of membrane transport require?
A) Water
B) Energy
C) Oxygen
D) Enzymes
Answer: B) Energy
5. What is active transport?
A) Movement of a substance to decrease the concentration gradient
B) Movement of water through a permeable membrane
C) Movement of a substance to increase the concentration gradient
D) Random movement of molecules in a solution
Answer: C) Movement of a substance to increase the concentration gradient
6. What are adenine and guanine classified as?
,A) Pyrimidines
B) Amino acids
C) Purines
D) Nucleotides
Answer: C) Purines
7. What is Adenosine Triphosphate (ATP)?
A) A protein that carries oxygen in the blood
B) The central molecule in chemical energy transfer within cells that releases energy
when broken
C) A lipid that stores long-term energy
D) A nucleic acid that stores genetic information
Answer: B) The central molecule in chemical energy transfer within cells that
releases energy when broken
8. How many amino acids are there in total, and how are they linked?
A) 15 total, linked by hydrogen bonds
B) 20 total, linked by peptide bonds
C) 25 total, linked by ionic bonds
D) 20 total, linked by covalent bonds
Answer: B) 20 total, linked by peptide bonds
9. When an acid dissociates in water, what does it produce?
A) OH- and a cation
B) H+ and a cation
C) H+ and an anion
D) OH- and an anion
Answer: C) H+ and an anion
10. What does Anatomy study?
A) The function of living organisms and their parts
B) The form and structure of the body
C) The chemical reactions within cells
D) The development of organisms from conception to birth
Answer: B) The form and structure of the body
11. What is the function of anchoring sites on the plasma membrane?
A) Bind ligand receptors on another cell
B) Communicate to other cells
C) Secure the cytoskeleton to the plasma membrane
D) Perform cell to cell attachments
Answer: C) Secure the cytoskeleton to the plasma membrane
12. What are anions?
, A) Ions with a positive charge that lose an electron
B) Ions with a negative charge that gain an electron
C) Neutral atoms with no charge
D) Atoms that share electrons with other atoms
Answer: B) Ions with a negative charge that gain an electron
13. What is an atom?
A) The largest particle that exhibits chemical properties of an element
B) A group of atoms with a positive or negative charge
C) The smallest particle that exhibits the chemical properties of an element
D) Two or more elements combined in a fixed ratio
Answer: C) The smallest particle that exhibits the chemical properties of an element
14. What three subatomic particles compose atoms?
A) Protons (+), electrons (-), and photons
B) Neutrons, electrons (-), and positrons
C) Protons (+), neutrons, and electrons (-)
D) Protons (+), neutrons, and photons
Answer: C) Protons (+), neutrons, and electrons (-)
15. Atoms with five, six, or seven electrons in their valence shell become what?
A) Cations
B) Isotopes
C) Neutral atoms
D) Anions
Answer: D) Anions
16. Atoms with one, two, or three electrons in their valence shell become what?
A) Anions
B) Cations
C) Isotopes
D) Neutral compounds
Answer: B) Cations
17. What is a base?
A) A proton donor
B) A substance that releases H+ ions
C) A substance that accepts H+ when added to a solution
D) A molecule that lowers pH
Answer: C) A substance that accepts H+ when added to a solution
18. What is another name for a base?
A) Proton donor
B) Proton acceptor
