1. Which subatomic particle is located in the nucleus of an atom?
a. proton
b. electron
c. neutron
d. a and b
e. a and c
Atoms of the same element with different charges are
a. ions
b. nucleons
c. isotopes
d. acids
3. Sodium is atomic number 11. If it gives up an electron it will become:
a. an isotope
b. an acid
c. a cation
d. an anion
Elements are identified by their number of :
a. protons
b. electrons
c. neutrons
d. nucleons
T or F If two atoms have different atomic numbers, they may be isotopes of each other.
Which of these is NOT a main element found in the body?
a. Sodium
b. carbon
c. oxygen
d. nitrogen
When two atoms of the same element are bonded, it is called a:
d. ion
c. molecule
b. compound
a. miracle
When two atoms share a pair of electrons equally, it is a ____________ bond:
a. ionic
b. non-polar covalent
c. polar covalent
d. hydrogen
Which of these does NOT influence the rate of a chemical reaction?
a. temperature
b. concentration
c. catalysts
e. a, b, c
Which type of reaction is the following? AB >> A + B
a. synthesis
b. decomposition
c. exchange
d. oxidation
The water molecule is held together by ___________ bonds:
Substances that increase the rate of chemical reactions while remaining unchanged are:
a. catalysts
b. enzymes
c. anti-oxidants
e. a,b,c
13. A compound that can accept a proton (H+) when placed in water is a:
a. acid
c. anti-oxidant
d. hydration sphere
b. base
A salt can have which of the following?
a. H+
b. K+
c. OH-
5. Which carbohydrate monomer is the most common in living organisms?
a. fructose
b. galactose
c. Fructose
d. Glucose
16. Which disaccharide is composed of glucose plus galactose?
a. maltose
b. lactose
c. Sucrose
d. ribose
17. Where might we find glycogen in the human body?
a. muscle
b. liver
c. fat cells
e. b and c
18. Which of these is NOT a function for proteins?
a. adhesion
b. cell signalling
c. receptors
d. energy storage
T or F The sodium pump moves potassium from a high concentration to a low concentration.
20. An unsaturated fat has a ___________ bond between at least two carbons.
b. polar covalent
c. non-polar covalent
d. double covalent
Triglycerides have three fatty acids attached to a _____________ molecule.
a. carbon
b. glycerol
c. protein
d. glucose
22. Steroid molecules are all derivatives of :
a. testosterone
b. estrogen
c. Cortisol
d. Cholesterol
3. Which of these is NOT a function of lipids?
a. energy storage
c. membrane component
d. vitamins
Which monomers make up proteins?
a. fatty acids
b. nucleic acids
c. amino acids
d. any acids
Which of these is NOT a nucleotide?
a. ATP
b. GTP
c. cAMP
d. DNA
Which of the following is NOT a major component of cell membranes?
a. phospholipids
b. amino acids
c. proteins
d. cholesterol
Which type of junction allows passage between cells (not from the inside of one cell to the inside of another)?
a. tight junctions
b. desmosomes
c. gap junctions
Which of these is NOT involved in facilitated diffusion?
a. movement from high concentration to low
b. protein helper
c. ATP
d. all are needed
Which of these molecules can cross the membrane by simple diffusion?
a. water
b. small ions
c. glucose
d. small proteins
A cell is placed in a solution. Over time the cell begins to shrink. The solution is:
a. isotonic
b. hypertonic
c. hypotonic
d. isoosmotic
The sodium–potassium pump (Na-K-ATPase; sodium pump) produces which situation?
a. high sodium inside, high potassium concentration outside cell
b. high sodium and potassium inside cell
c. high sodium and potassium outside cell
d. high potassium inside, high sodium concentration outside cell
Which type of molecules can diffuse across a lipid bilayer?
a. small, polar
c. lipids
d. all can
Which organelle is the site of ATP production/energy conversion?
a. Golgi
b. mitochondria
c. ER
d. Centriole
. Which organelle is the main site of protein production? a. rough ER b. mitochondria c. ribosome d. Golgi
a. rough ER
c. ribosome
d. Golgi
What protein is needed to be in the membrane for endocytosis to occur?
a. colchicines
b. clathrin
c. collagen
d. microtubules
Which organelle is involved in modifying and packaging molecules for transport within and to the outside of the cell ?
a. ribosomes
c. golgi
d. centriole
Which cytoskeletal elements are composed of tubulin?
a. microtubules
b. microfilaments
c. intermediate fibers
d. all are
Which of these is NOT part of the endomembrane system?
b. ER
c. Nuclear membrane
d. all are part of the system
Where are ribosomes formed?
a. nucleolus
b. centrosome
d. cilia
Which of these would NOT be a function for a lysosome?
a. formation of lipids
b. destroying bacteria
c. breaking down bone
d. recycling organelles
What is produced in the smooth ER
a. ribosome
b. proteins
c. DNA
d. lipids
A cell replicates its DNA/chromosomes during:
a. G1
b. S
c. G2
d. Mitosis
T or F The receptors which are linked to “G” proteins both bind to hormones and cause those hormones to enter the cell.
. T or F Cell membranes have proteins in them, some of which are enzymes.
. What occurs during G1 of the cell cycle?
a. growth for functioning
b. DNA replication
c. growth for division
d. separation of chromosomes
T or F TSH is released from the hypothalamus and causes the pituitary to produce TRH.
What occurs during metaphase?
a. spindles form
b. chromosomes line up in a straight line
c. chromosomes are pulled apart
d. new nuclei form
48. Which would occur with hyperthyroidism?
Cold intolerance
b. weight gain
c. sluggishness
d. none is correct
T or F The main hormone produced by the thyroid gland is T3, but the most active hormone is T4.
The structural and functional unit of life is: a. atom b. molecule c. cell d. tissue
a. atom
b. molecule
c. cell
d. tissue
