Bio 1010 - General Biology » Summer 2022 » Unit 2 Exam
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Question #1
In a water molecule, hydrogen and oxygen are held together by a(an) ______ bond.
A.
polar covalent
B.
ionic
C.
double covalent
D.
hydrogen
E.
nonpolar covalent
Question #2
Which of the following is an acid?
A.
HCl
B.
CH4
C.
H2O
D.
NaOH
E.
NaCl
Question #3
The primary structure of a protein is ______.
A.
maintained by hydrogen bonds
B.
irregular folding
C.
an ∝ (alpha) helix or a pleated sheet
D.
composed of two or more polypeptide chains
E.
the amino acid sequence of the polypeptide chain
Question #4
What is the name given to the reaction that breaks peptide bonds?
A.
synthesis
B.
anabolism
C.
hydrolysis
D.
hydrogenation
E.
denaturation
Question #5
Table sugar is ______.
A.
lactose
B.
maltose
C.
fructose
D.
sucrose
E.
glucose
Question #6
Which of the following is a function of the plasma membrane?
A.
regulation of the passage of material into and out of the cell
B.
control center of the cell
C.
fat synthesis
D.
intracellular digestion
E.
protein synthesis
Question #7
Which organelle is responsible for photosynthesis?
A.
chloroplast
B.
ribosome
C.
nucleolus
D.
mitochondrion
E.
smooth endoplasmic reticulum
Question #8
______ are the major lipids of plasma membranes.
A.
Triglycerides
B.
Steroids
C.
Mosaics
D.
Prostaglandins
E.
Phospholipids
Question #9
When digested, nucleic acids are broken down into ______.
A.
glycerols
B.
nucleotides
C.
amino acids
D.
fatty acids
E.
monosaccharides
Question #10
The function of the sphincter at the downstream end of the stomach is to ______.
A.
release acid chyme into the duodenum in periodic squirts
B.
release bile and pancreatic secretions into the duodenum when chyme is present
C.
release bile into the duodenum when chyme is present
D.
release pancreatic secretions into the duodenum when chyme is present
E.
retain acid chyme in the stomach until pepsin digestion is complete
Question #11
The stomach's gastric glands secrete ______.
A.
hydrochloric acid only
B.
mucus only
C.
mucus, digestive enzymes, and hydrochloric acid
D.
digestive enzymes only
E.
digestive enzymes and hydrochloric acid
Question #12
Which of the following nutrients begins undergoing digestion only when it reaches the small intestine?
A.
protein
B.
starch
C.
fat
D.
polypeptide
E.
complex carbohydrate
Question #13
Osmosis can be defined as ______.
A.
endocytosis
B.
the diffusion of nonpolar molecules
C.
the diffusion of a solute
D.
the diffusion of water
E.
active transport
Question #14
The fragrance of bread baking in a kitchen spreads to other rooms by
A.
diffusion
B.
active transport
C.
magic
D.
osmosis
E.
selective permeation
Question #15
The number of electrons surrounding an atom's nucleus never changes.
A.
False
B.
True
Question #16
Phosopholipids are found in cell membranes.
A.
True
B.
False
Question #17
When choosing the healthiest type of fat to include in a diet, an individual should include more saturated fat than unsaturated fat because saturated fat appears to decrease the risk of heart disease.
A.
True
B.
False
Question #18
Animal and plant cells contain organelles.
A.
True
B.
False
Question #19
Because they are not soluble in water, fats are digested in a different way than proteins and carbohydrates.
A.
False
B.
True
Question #20
Match the correct atomic structure to its description. a component of an atom that carries a negative charge
A.
atom
B.
covalent bond
C.
iostope
D.
ionic bond
E.
electron
Question #21
Match the correct atomic structure to its description. the smallest unit of matter
A.
atom
B.
covalent bond
C.
iostope
D.
electron
E.
ionic bond
Question #22
Match the correct atomic structure to its description. a bond that is formed when electrons are exchanged between atoms
A.
ionic bond
B.
covalent bond
C.
atom
D.
iostope
E.
electron
Question #23
Match the correct atomic structure to its description. a bond that is formed when electrons are shared between atoms
A.
electron
B.
atom
C.
iostope
D.
ionic bond
E.
covalent bond
Question #24
Match the correct atomic structure to its description. different forms of the same element that differ in the number of neutrons they contain
A.
atom
B.
iostope
C.
electron
D.
ionic bond
E.
covalent bond
Question #25
Match the description to its correct structure. six-carbon monosaccharide
A.
glycogen
B.
fiber
C.
glucose
D.
cellulose
E.
starch
Question #26
Match the description to its correct structure. storage form of carbohydrates in plants
A.
glucose
B.
starch
C.
cellulose
D.
fiber
E.
glycogen
Question #27
Match the description to its correct structure. plant cell wall
A.
fiber
B.
glucose
C.
starch
D.
cellulose
E.
glycogen
Question #28
Match the description to its correct structure. storage form of carbohydrates in animals
A.
glucose
B.
starch
C.
glycogen
D.
fiber
E.
cellulose
Question #29
Match the description to its correct structure. all indigestible polysaccharides
A.
fiber
B.
starch
C.
glucose
D.
cellulose
E.
glycogen
Question #30
Match the organ of the digestive system to its function. produces pepsin
A.
stomach
B.
mouth
C.
pharnyx
D.
small intestine
Question #31
Match the organ of the digestive system to its function. site of most digestion
A.
pharnyx
B.
stomach
C.
mouth
D.
small intestine
Question #32
Match the organ of the digestive system to its function. site of most absorption
A.
pharnyx
B.
small intestine
C.
mouth
D.
stomach
Question #33
Match the organ of the digestive system to its function. produces saliva
A.
stomach
B.
mouth
C.
pharnyx
D.
small intestine
Question #34
Match the organ of the digestive system to its function. epiglottis
A.
pharnyx
B.
small intestine
C.
stomach
D.
mouth
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