exam 1 2017 Flashcards
what atom is hydrogen covalently bondend to when it is part of a hydrogen bond
D
according to the figure in chapter 1 which of the following groups of organisms shared a common ancestor most recently
Animals and plants
which of the following allows communication between animal cells Atight junction B desmosome C gap junction DCentrioles E peroxisome
C Gap junction
which of the following polysaccharides contain branching
A glycogen B starch C cellulose D glycogen starch and cellulose Eglycogen and starch
Glycogen and starch
a cross section of this organelle contains a “9+2” pattern of microtubules. what is it ?
eukaryotic flagella or cilia
where would you find a lot of collagen
Extracellular matrix of animal cell
channel proteins that specifically allow the passage of water across a membrane are known as
Aquaporins
who proposed natural selection as the mechanism of evolution
Darwin
which organelle does not contain membrane as part of its structure?
Ribosomes
which of the following statements about water is not true
it realeses a large amout of heat when changing from liquid to vapor
facilitated diffusion and active transport both
require a specific protein in the membrane
what is the name of the special bond that can form between two cysteins
Disulfide bridge
the cell walls of plants contain
Cellulose
what kind of molecule i
x
a molecule that accepts protons when in a solution is a
Base
hydrogen bonds are important in
DNA water cellulose and proteins
polymers are converted to monomers by
hydrolysis
which of the following are part of the cell theory
all organisms are composed of one or more cells and all cells come from preexisting cells
how many covalent bonds dose phosphorus usally form in biologically important molecules
5
what is the function of ribosomes
Protein synthesis
which of the following can be used as an energy source for active transport
ATB and an ion gradient
a cell that is put into a hypertonic solution. what happens
water will leave the cell
white blood cell is engulfing a foreign cell what is the name of this process
Ednocytosis
which of the following statements about ATP is not true?
A. ATP is a nucleotide
B. ATP is used in eukaryotic cells but not prokaryotic cells
C. ATP is an energy carrier
D. AP has 3 phosphate groups
E. most of the ATP in Eukaryotic cells is made in the mitochondria
B. ATP is used in eukaryotic cells but not prokaryotic cells
which of the following is not a monosaccharide A ribose B fructose C glycogen D peptidoglycan E maltose
Maltose
which of the following is a polysaccharide used for energy storage in animals
A Chitin B Triglyceride C Glycogen D Peptidoglycan E Maltose
Glycogen
prokaryotic cells contain \_\_\_\_\_ A mitcochondria B ribosomes C lysosomes D cytoskeleton e none
B Ribosomes
which of the following organelles have their own DNA and Ribosomes
A choroplast B Mitochondria C centriols D A and B E none
D chloroplast and mitochondria
which of the following statements is not true regarding glycogen starch and cellulose
All three are easily digested by most animals
molecules which dissolve in water are called
hydrophilic
why are most cells very small
small cells have a large surface area to volume ratio
which of the following would not be found in a plant cell
A Mitochondria B cytoskeleton C golgi apparatus D Vacuole E endoplasmic reticulum
Endoplasmic reticulum
which of the following contains enzymes that can hydrolyze many kinds of macromolecules
A golgi apparatus B lysosomes C mitochondria D Ribosomes E endoplasmic reticulum
Lysosomes
many eukaryotic cells make proteins that are exported from the cell where are these proteins synthesized
rough endoplasmic reticulum
which organelle sorts modifies and packages newly synthesized proteins before being sent out to their final destinations
Golgi Apparatus
which of the following regular the entry and exit of materials from the cell
plasma membrane
what scientist demonstrated that flies are not spontaneously generated by rotting meat
Redi
which of the following has the greatest electro negativity
carbon phosphorus oxygen hydrogen nitrogen
oxygen
which of the following have prokaryotic cell structure
A bacteria B archaea C eukarya D both A and B E both B and C
D both Bacteria and Archaea
a scientist isolate chloroplast and studies them in a testable what kind of experiment is being done
in vitro
hydrophobic interactions
can hold two non polar molecules together
which of the following would increase the fluidity of a membrane
A. increasing the temp
B increasing the amount of unsaturated fatty acid
C using shorter fatty acids
D a and C
E a b and C
E a b and c
ribozymes are
Rna catalyst
lipid syntesis in eukaryotic cells takes place in the
smooth endoplasmic reticulum
which of the following can move in and out of cells by diffusion
O2 carbon dioxide and lipids
which of the following best describes a phospholipid
glycerol joined to 2 fatty acids and 1 phosphate containing group
denaturation of a protein changes the primary structure
false
all lipids are\_\_\_\_ A triglycerides B polar C hydrophilic D polymers of fatty acids E more soluble in nonpolar solvents than in water
more soluble in non polar solvents than in water
49 according to the theory of evolution
all organisms share a common ancestor
the organelles of cells can be separated from one another to study the this separation is called
cell fractionation
