15212767
Pregunta 1
Pregunta
1. Which subatomic particle is located in the nucleus of an atom?
Respuesta
-
a. proton
-
b. electron
-
c. neutron
-
d. a and b
-
e. a and c
Pregunta 2
Pregunta
Atoms of the same element with different charges are
Respuesta
-
a. ions
-
b. nucleons
-
c. isotopes
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d. acids
Pregunta 3
Pregunta
3. Sodium is atomic number 11. If it gives up an electron it will become:
Respuesta
-
a. an isotope
-
b. an acid
-
c. a cation
-
d. an anion
Pregunta 4
Pregunta
Elements are identified by their number of :
Respuesta
-
a. protons
-
b. electrons
-
c. neutrons
-
d. nucleons
Pregunta 5
Pregunta
T or F If two atoms have different atomic numbers, they may be isotopes of each other.
Respuesta
- True
- False
Pregunta 6
Pregunta
Which of these is NOT a main element found in the body?
Respuesta
-
a. Sodium
-
b. carbon
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c. oxygen
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d. nitrogen
Pregunta 7
Pregunta
When two atoms of the same element are bonded, it is called a:
Respuesta
-
d. ion
-
c. molecule
-
b. compound
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a. miracle
Pregunta 8
Pregunta
When two atoms share a pair of electrons equally, it is a ____________ bond:
Respuesta
-
a. ionic
-
b. non-polar covalent
-
c. polar covalent
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d. hydrogen
Pregunta 9
Pregunta
Which of these does NOT influence the rate of a chemical reaction?
Respuesta
-
a. temperature
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b. concentration
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c. catalysts
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d. a and b
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e. a, b, c
Pregunta 10
Pregunta
Which type of reaction is the following?
AB >> A + B
Respuesta
-
a. synthesis
-
b. decomposition
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c. exchange
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d. oxidation
Pregunta 11
Pregunta
The water molecule is held together by ___________ bonds:
Respuesta
-
a. ionic
-
b. non-polar covalent
-
c. polar covalent
-
d. hydrogen
Pregunta 12
Pregunta
Substances that increase the rate of chemical reactions while remaining unchanged are:
Respuesta
-
a. catalysts
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b. enzymes
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c. anti-oxidants
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d. a and b
-
e. a,b,c
Pregunta 13
Pregunta
13. A compound that can accept a proton (H+) when placed in water is a:
Respuesta
-
a. acid
-
c. anti-oxidant
-
d. hydration sphere
-
b. base
Pregunta 14
Pregunta
A salt can have which of the following?
Respuesta
-
a. H+
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b. K+
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c. OH-
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d. a and b
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e. a and c
Pregunta 15
Pregunta
5. Which carbohydrate monomer is the most common in living organisms?
Respuesta
-
a. fructose
-
b. galactose
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c. Fructose
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d. Glucose
Pregunta 16
Pregunta
16. Which disaccharide is composed of glucose plus galactose?
Respuesta
-
a. maltose
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b. lactose
-
c. Sucrose
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d. ribose
Pregunta 17
Pregunta
17. Where might we find glycogen in the human body?
Respuesta
-
a. muscle
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b. liver
-
c. fat cells
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d. a and b
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e. b and c
Pregunta 18
Pregunta
18. Which of these is NOT a function for proteins?
Respuesta
-
a. adhesion
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b. cell signalling
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c. receptors
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d. energy storage
Pregunta 19
Pregunta
T or F The sodium pump moves potassium from a high concentration to a low concentration.
Respuesta
- True
- False
Pregunta 20
Pregunta
20. An unsaturated fat has a ___________ bond between at least two carbons.
Respuesta
-
a. ionic
-
b. polar covalent
-
c. non-polar covalent
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d. double covalent
Pregunta 21
Pregunta
Triglycerides have three fatty acids attached to a _____________ molecule.
Respuesta
-
a. carbon
-
b. glycerol
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c. protein
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d. glucose
Pregunta 22
Pregunta
22. Steroid molecules are all derivatives of :
Respuesta
-
a. testosterone
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b. estrogen
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c. Cortisol
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d. Cholesterol
Pregunta 23
Pregunta
3. Which of these is NOT a function of lipids?
Respuesta
-
a. energy storage
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b. enzymes
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c. membrane component
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d. vitamins
Pregunta 24
Pregunta
Which monomers make up proteins?
Respuesta
-
a. fatty acids
-
b. nucleic acids
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c. amino acids
-
d. any acids
Pregunta 25
Pregunta
Which of these is NOT a nucleotide?
Respuesta
-
a. ATP
-
b. GTP
-
c. cAMP
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d. DNA
Pregunta 26
Pregunta
Which of the following is NOT a major component of cell membranes?
Respuesta
-
a. phospholipids
-
b. amino acids
-
c. proteins
-
d. cholesterol
Pregunta 27
Pregunta
Which type of junction allows passage between cells (not from the inside of one cell to the inside of another)?
Respuesta
-
a. tight junctions
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b. desmosomes
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c. gap junctions
-
d. a and b
Pregunta 28
Pregunta
Which of these is NOT involved in facilitated diffusion?
Respuesta
-
a. movement from high concentration to low
-
b. protein helper
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c. ATP
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d. all are needed
Pregunta 29
Pregunta
Which of these molecules can cross the membrane by simple diffusion?
Respuesta
-
a. water
-
b. small ions
-
c. glucose
-
d. small proteins
Pregunta 30
Pregunta
A cell is placed in a solution. Over time the cell begins to shrink. The solution is:
Respuesta
-
a. isotonic
-
b. hypertonic
-
c. hypotonic
-
d. isoosmotic
Pregunta 31
Pregunta
The sodium–potassium pump (Na-K-ATPase; sodium pump) produces which situation?
Respuesta
-
a. high sodium inside, high potassium concentration outside cell
-
b. high sodium and potassium inside cell
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c. high sodium and potassium outside cell
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d. high potassium inside, high sodium concentration outside cell
Pregunta 32
Pregunta
Which type of molecules can diffuse across a lipid bilayer?
Respuesta
-
a. small, polar
-
b. small ions
-
c. lipids
-
d. all can
Pregunta 33
Pregunta
Which organelle is the site of ATP production/energy conversion?
Respuesta
-
a. Golgi
-
b. mitochondria
-
c. ER
-
d. Centriole
Pregunta 34
Pregunta
. Which organelle is the main site of protein production?
a. rough ER b. mitochondria c. ribosome d. Golgi
Respuesta
-
a. rough ER
-
b. mitochondria
-
c. ribosome
-
d. Golgi
Pregunta 35
Pregunta
What protein is needed to be in the membrane for endocytosis to occur?
Respuesta
-
a. colchicines
-
b. clathrin
-
c. collagen
-
d. microtubules
Pregunta 36
Pregunta
Which organelle is involved in modifying and packaging molecules for transport within and to the outside of the cell ?
Respuesta
-
a. ribosomes
-
b. mitochondria
-
c. golgi
-
d. centriole
Pregunta 37
Pregunta
Which cytoskeletal elements are composed of tubulin?
Respuesta
-
a. microtubules
-
b. microfilaments
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c. intermediate fibers
-
d. all are
Pregunta 38
Pregunta
Which of these is NOT part of the endomembrane system?
Respuesta
-
a. Golgi
-
b. ER
-
c. Nuclear membrane
-
d. all are part of the system
Pregunta 39
Pregunta
Where are ribosomes formed?
Respuesta
-
a. nucleolus
-
b. centrosome
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c. golgi
-
d. cilia
Pregunta 40
Pregunta
Which of these would NOT be a function for a lysosome?
Respuesta
-
a. formation of lipids
-
b. destroying bacteria
-
c. breaking down bone
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d. recycling organelles
Pregunta 41
Pregunta
What is produced in the smooth ER
Respuesta
-
a. ribosome
-
b. proteins
-
c. DNA
-
d. lipids
Pregunta 42
Pregunta
A cell replicates its DNA/chromosomes during:
Respuesta
-
a. G1
-
b. S
-
c. G2
-
d. Mitosis
Pregunta 43
Pregunta
T or F The receptors which are linked to “G” proteins both bind to hormones and cause those hormones to enter the cell.
Respuesta
- True
- False
Pregunta 44
Pregunta
. T or F Cell membranes have proteins in them, some of which are enzymes.
Respuesta
- True
- False
Pregunta 45
Pregunta
. What occurs during G1 of the cell cycle?
Respuesta
-
a. growth for functioning
-
b. DNA replication
-
c. growth for division
-
d. separation of chromosomes
Pregunta 46
Pregunta
T or F TSH is released from the hypothalamus and causes the pituitary to produce TRH.
Respuesta
- True
- False
Pregunta 47
Pregunta
What occurs during metaphase?
Respuesta
-
a. spindles form
-
b. chromosomes line up in a straight line
-
c. chromosomes are pulled apart
-
d. new nuclei form
Pregunta 48
Pregunta
48. Which would occur with hyperthyroidism?
Respuesta
-
Cold intolerance
-
b. weight gain
-
c. sluggishness
-
d. none is correct
Pregunta 49
Pregunta
T or F The main hormone produced by the thyroid gland is T3, but the most active hormone is T4.
Respuesta
- True
- False
Pregunta 50
Pregunta
The structural and functional unit of life is:
a. atom b. molecule c. cell d. tissue
Respuesta
-
a. atom
-
b. molecule
-
c. cell
-
d. tissue
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