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.
hydrogen
B.
double covalent
C.
polar covalent
D.
ionic
E.
nonpolar covalent
Question #2
Which of the following is an acid?
A.
H2O
B.
CH4
C.
HCl
D.
NaOH
E.
NaCl
Question #3
The primary structure of a protein is ______.
A.
composed of two or more polypeptide chains
B.
the amino acid sequence of the polypeptide chain
C.
irregular folding
D.
maintained by hydrogen bonds
E.
an ∝ (alpha) helix or a pleated sheet
Question #4
What is the name given to the reaction that breaks peptide bonds?
A.
anabolism
B.
hydrolysis
C.
denaturation
D.
synthesis
E.
hydrogenation
Question #5
Table sugar is ______.
A.
glucose
B.
sucrose
C.
fructose
D.
lactose
E.
maltose
Question #6
Which of the following is a function of the plasma membrane?
A.
control center of the cell
B.
protein synthesis
C.
intracellular digestion
D.
regulation of the passage of material into and out of the cell
E.
fat synthesis
Question #7
Which organelle is responsible for photosynthesis?
A.
smooth endoplasmic reticulum
B.
mitochondrion
C.
chloroplast
D.
nucleolus
E.
ribosome
Question #8
______ are the major lipids of plasma membranes.
A.
Triglycerides
B.
Steroids
C.
Phospholipids
D.
Mosaics
E.
Prostaglandins
Question #9
When digested, nucleic acids are broken down into ______.
A.
fatty acids
B.
monosaccharides
C.
nucleotides
D.
glycerols
E.
amino acids
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.
retain acid chyme in the stomach until pepsin digestion is complete
C.
release pancreatic secretions into the duodenum when chyme is present
D.
release bile and pancreatic secretions into the duodenum when chyme is present
E.
release bile into the duodenum when chyme is present
Question #11
The stomach's gastric glands secrete ______.
A.
digestive enzymes and hydrochloric acid
B.
hydrochloric acid only
C.
mucus only
D.
digestive enzymes only
E.
mucus, 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.
complex carbohydrate
C.
fat
D.
starch
E.
polypeptide
Question #13
Osmosis can be defined as ______.
A.
the diffusion of water
B.
active transport
C.
endocytosis
D.
the diffusion of a solute
E.
the diffusion of nonpolar molecules
Question #14
The fragrance of bread baking in a kitchen spreads to other rooms by
A.
osmosis
B.
active transport
C.
selective permeation
D.
magic
E.
diffusion
Question #15
The number of electrons surrounding an atom's nucleus never changes.
A.
True
B.
False
Question #16
Phosopholipids are found in cell membranes.
A.
False
B.
True
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.
True
B.
False
Question #20
Match the correct atomic structure to its description. a component of an atom that carries a negative charge
A.
ionic bond
B.
iostope
C.
covalent bond
D.
atom
E.
electron
Question #21
Match the correct atomic structure to its description. the smallest unit of matter
A.
covalent bond
B.
iostope
C.
ionic bond
D.
atom
E.
electron
Question #22
Match the correct atomic structure to its description. a bond that is formed when electrons are exchanged between atoms
A.
atom
B.
ionic bond
C.
covalent bond
D.
electron
E.
iostope
Question #23
Match the correct atomic structure to its description. a bond that is formed when electrons are shared between atoms
A.
electron
B.
iostope
C.
covalent bond
D.
ionic bond
E.
atom
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.
ionic bond
B.
covalent bond
C.
electron
D.
atom
E.
iostope
Question #25
Match the description to its correct structure. six-carbon monosaccharide
A.
cellulose
B.
glucose
C.
starch
D.
fiber
E.
glycogen
Question #26
Match the description to its correct structure. storage form of carbohydrates in plants
A.
fiber
B.
cellulose
C.
starch
D.
glycogen
E.
glucose
Question #27
Match the description to its correct structure. plant cell wall
A.
glycogen
B.
fiber
C.
starch
D.
glucose
E.
cellulose
Question #28
Match the description to its correct structure. storage form of carbohydrates in animals
A.
glycogen
B.
glucose
C.
starch
D.
fiber
E.
cellulose
Question #29
Match the description to its correct structure. all indigestible polysaccharides
A.
starch
B.
cellulose
C.
fiber
D.
glycogen
E.
glucose
Question #30
Match the organ of the digestive system to its function. produces pepsin
A.
pharnyx
B.
small intestine
C.
stomach
D.
mouth
Question #31
Match the organ of the digestive system to its function. site of most digestion
A.
small intestine
B.
pharnyx
C.
mouth
D.
stomach
Question #32
Match the organ of the digestive system to its function. site of most absorption
A.
mouth
B.
small intestine
C.
stomach
D.
pharnyx
Question #33
Match the organ of the digestive system to its function. produces saliva
A.
small intestine
B.
pharnyx
C.
stomach
D.
mouth
Question #34
Match the organ of the digestive system to its function. epiglottis
A.
small intestine
B.
stomach
C.
mouth
D.
pharnyx
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