Biology Test 2

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terms and questions taken from worksheets for Biology. Chapters 3-6

Which statement is true about ribosomes?
A. Ribosomes contain DNA and protein.
B. Ribosomes are active in carbohydrates synthesis.
C. Ribsomal subunits leave the nucleus after being formed by the nucleolus.
D. Polyribosomes are the subunits of ribosomes.
E. Ribosomes are only found associated with the endoplasmic reticulum in prokaryotic cells.

C

Which is NOT true concerning the Golgi complex?
A. It consists of a stack of saccules
B. Golgi complezes in animal cells have an inner face and an outer face.
C. Molecules are modified within the lumen of Golgi saccules.
D. Lysosomes are vesicles that bind to enter the Golgi saccules.
E. Golgi apparatus contain enzymes.

D

Membrane-bound vesicles that contain enzyme for oxidizing small organic molecules with the formation of hydrogen peroxide are:
A. Vacuoles
B. Vesicles
C. Glyoxisomes
D. Lysosomes
E. Peroxisomes

E

Large membranous sacs that are more prevalent in plant cells than in animal cells are called:
A. Vacuoles
B. Vesicles
C. Glyoxisomes
D. Lysosomes
E. Peroxisomes

A

Which is NOT a characteristic of chloroplasts?
A. A chloroplast is surrounds by a double membrane.
B. Chlorophyll absorbs solar energy tht is use to form chemical bonds.
C. A membrane inside a chloroplast is called a thylakoid.
D. Stacks called grana are linked by membranous connections.
E. Chlorophylls are found in the fluid stroma and the chloroplasts

E

Which is NOT a characteristic of mitochondria?
A. Mitochondrion have two membranes
B. Mitochondria are the site of cellular respiration.
C. Mitochondria are found in prokaryotic and eukaryotic cells.
D. Mitochondria contain DNA and ribosomes.
E. THe inner space of the mitochondrion contains a fluid matrix.

C

The cells that line our respiratory tract, and one-celled paramecia both have these short hair-like projections:
A. Flagella
B. Microfilaments
C. Centriole
D. Cilia
E. Pili

D

After being formed by ribosomes located on the endoplasmic reticulum, what is the next organelle to which a protein could be transported?
A. Mitochonrdria
B. Smooth endoplasmic reticulum
C. Golgi apparatus
D. Nucleus

C

The nucleus is NOT important as the site of:
A. DNA synthesis
B. RNA synthesis
C. Synthesis of ribosomal subunits
D. Protein synthesis

D

Of the following, which is NOT associatedwith the mitochondria:
A. ATP productions
B. Cristae
C. Stroma
D. Matrix

C

Which of the folowing suggested the name "cell" for the basic unit of structure and function?
A. Virchow
B. Schleiden
C. Schwann
D. Hook
E. vanLeeuwenhoek

D

Which of these statements is NOT true about DNA?
A. It is the genetic material of a cell.
B. It forms a double helix.
C. Adenine pairs with Thymine and guanine pairs with cytosine.
D. It contains the sugar ribose.
E. the sugar and phosphate groups forms the backbone of the molecule.

D

Which is NOT true about the cell theory?
A. Its various parts were described by Schleiden, Schwann, and Virchow
B. It states that all organisms are compese of cells.
C. It states that all cells come from preexisting cells.
D. It states that bacteria and other small organisms can arise spontaneously.
E. It is accepted today by biologists as applying to cirtuall all forms of life.

D

The final 3-dimensional shape of most protein which is responsible for function:
A. Primary
B. Secondary
C. Tertiary
D. Quarternary

C

Select the membrane molecule that is made up of a polar region with two nonpolar fatty acid tails.
A. Phospholipid
B. Cell surgace proteins
C. Transmembrane proteins
D. Carbohydrate chains

A

The passive movement of a substance along its concentration gradient is termed:
a. Active transport
b. dialysis
c. diffusion
d. exocytosis
e. osmosis

c

Phospholipids can form bilayer structures because of there:
a. rectangular shapes
b. amphipathic nature
c. ability to dissolve well in water
d. inability to associate with other phospholips
e. lack of fatty acids

b

Passages through the cell membrane are formed from:
a. holes in the lipid molecules
b. large highly regulated pores
c. phospholipid molecules.
d. protein molecules embedded in the membrane
e. regions where the membrane is one molecule thick

d

what advantage would a plant cell have other an animal call if both were place in pure water?
a. the cell would resist drink
b. the cell would resist bursting
c. the cell would reproduce at a faster rate
d. both a and c
e. none of the above

b

a structure found at the junction between some plan cells:
a. chloroplasts
b. desmosomes
c. endoplasmic reticulum
d. cell wall
e. plasmodesmata

e

If a cell is placed into a hypotonic soluction, which will occur:
a. salts will mobe into the cell from the surrounding solution.
b. water will move into the cell from the surrounding solution.
c. salts will move our othe cell into the surrounding solution.
d. choices a and b
e. choices b and c

b

the major functions of the plasma membrane do not inclue:
a. separation of the fluid environment inside and outside of cell
b. regulation of molecules and ions that pass into and out of the cell.
c. recognition and communication between different cell tissues.
d. maintaining connections between adjacent cells.
e. production of proteins used in construction of the cell wall.

e

the energy requiring movement of materials against a concentration gradient is termed:
a. active transport
b. dialysis
c. facilitated diffusion
d. osmosis
c. plasmolysis

a

Large particles are taken into the cell by:
a. endocytosis
b. exocytosis
c. simple diffusion
d. none of the above

a

carrier molecules are required for:
a. osmosis
b. facilitated diffusion
c. active transport
d. b and c

d

Pinocytosis is an example of:
a. facilitated transport
b. active transport
c. contransport
d. endocytosis
e. exocytosis

d

Which of the following processes requires energy?
a. diffusion
b. osmosis
c. facilitated diffusion
d. active transport
e. all of the above

d

the most important form of useful energy in all living things including humans is:
a. chemical bond energy
b. electrical bond energy
c. heat
d. light

d

holes in plant cell walls allowing cummunication between adjacent cells:
a. desmosomes
b. plasmodesmata
c. gap juntions
d. organizing junctions

b

The chemical nature of enzymes is that they are all
a. acids
b. proteins
c. carbohydrates
d. lipids

b

Which is False:
a. amino acids are a kinda of monomer
b. fatty acids are building blocks of lipids
c. nucleotide are produced by the hydrolysis of proteins
d. sugars are monomers of polysaccharides
e. fat hydolysis yields fatty acids and glycerol

c

How do RNA and DNA differe?
a. they have different sugars.
b. DNA is double stranded molecule, RNA is single stranded.
c. Thymine is present in DNA, not RNA
d. Uracel is in RNA, not DNA
e. all of the above

e

Which association is not correct?
a. nucleic acid - genes
b. carbohydrate - ensymes
c. fats - long tern energy storage
d. proteins - cell memebrane structure
e. cellulose - plant structure

b

upon hydrolysis nuclein acids yield:
a. amino acids
b. fatty acids
c. nucleotides
d. all of the above

c

proteins are made up of ___ strung together by ____ bonds.
a. amino acids; peptide
b. monosaccharides; covalent
c. monomers; ionic
d. polymers; hydrogen

a

Hydolysis of a carbohydrate results in the
a. production of a polysaccharide
b. breakdown of polysaccharide
c. breakdown of a monosaccharide
d. production of fat

b

fatty acids that contain the maximum number of hydrogen atoms posssible are said to be
a. polyunsaturated
b. monounsaturated
c. saturated
d. phospholipids

c

which one of the following is not a principal macromolucule used to build cells?
a. crystals
b. carbohydrate
c. lipids
d. proteins

a

Which pair is mixmatched?
a. amino acid - protein
b. glycerol - glycogen
c. glucose - carbohydrates
d. phosphate - nucleotide

b

Which of these is not a characteristic of carbon?
a. forms four covalent bonds
b. bonds with other carbon atoms
c. is sometimes ionic
d. forms long chains
e. sometimes shares two pairs of electrons with another atom

c

The functional group -COOH is
a. acidic
b. basic
c. never ionized
d. found only in nucleotides
e. all of the above

a

a hydrophilic group is
a. attracted to water
b. polar and/or ionized group
c. found at the end of fatty acids
d. the opposide of a hydrophobic group
e. all of the above

e

which of these is an example of a hydrolysis rection?
a. amino acid + amindo acid ---> dipeptide + water
b. dipeptide + water ---> amino acid + amino acid
c. denaturation of polypeptide
d. both a and b
e. both b and c

b

Class of organic compounds that includes monosaccharides, disaccharides, and polysaccarides.

Carbohydrates

Class of organic compounds that tend to be soluble in nonplar solvents wuch as alcohol but insoluble in water.

lipid

Biomolecule consisting of covalently bonded monomers.

polymer

molecules that have the same molecular formula but a different structure and shape.

isomer

two or more amino acids joined together by covalent bonding

peptide

which of the following is the reason plants wilt on a hot summer day?
a. lost of water
b. lack of turgor pressure
c. heat weakens the plant cells walls
d. a and b

d

If a living plant were moved from a freshwater aquarium to a saltwater aquarium, which of the follwoing would occur?
a. nothing.
b. the plant's cells would take on ions
c. the plants cells would take on water
d. the plant's cells would lose water

d

Having similar ___ would allow tissues and organs to be transplanted easily.
a. cell recognition proteins
b. major histocampatibility complex proteins
c. carbohydrates chains in the cell membrane
d. all of the above

d

The major functions of plasma membrane do NOT include:
a. separation of the fluid environments inside and outside the cell.
b. regulations of molecules and ions that pass into and out of the cell.
c. recognition and communication between cells and tissues.
d. maintaining connections between adjacent cells.
e. production of proteins used in construction of the cell wall.

e

Which of the following functions does the lipid bilayer component of the cell membrane not provide for the cell?
a. controls that exchange of mater and chemical information btween one cell and adjacent cells or environment.
b. provides an impermeable, self sealing membrane capable of dividing or fusing the cell without breaking.
c. provides the matrix into which are inserted proteins that facilitate the exchange of matter between the inside and outside of the cell.
d. clearly defines a boundary preventing an quilibrium between the outside and inside of cell.
e. provides a fluid and flexible boundary that insulates the interior from the variations in humidity, food, and other external conditions.

a

The current theory of the structure of the plasma membrane is best describes by the ___ model.
a. sandwich
b. fluid-mosaic
c. unit membrane
d. electrochemical
e. unipermeable

b

in a phospholipid bilayer, the...
a. phosphate groups are hydrophobic.
b. fatty acid tails are ionized.
c. fatty acid tails are hydrophilic.
d. proteins are locates only between the two layers.
e. phosphate heads are oriented toward the exterior of the cell or towards the cytoplasm.

e

Which statement is true about the plasma membrane?
a. the proteins make up the matrix of the membrane.
b. the model can be likened to a sandwhich where phospholipids are like the bread and proteins are like the filling.
c. the fluid nature of the membrane is regulated by a flip flopping of the phospholipids from one side of the membrane to the other.
d. movement of proteins and phospholipids can occur sideways within the plane of a membrane.

d

Which statement is not true about the proteins in the plasma membrane?
a. proteins may be attached to thei nner surgace of the plasma membrane.
b. the hydrophobic portion of a protein is embedded within the membrane.
c. some peripheral proteins are connected to cytoseletal filaments.
d. integral proteins are responsible for membrane functions.
e. Glycoproteins contain carbohydrate chains that are oriented toward the inner surface of the membrane.

e

Which phrase does not describe one of the functions of proteins of the plasma membrane?
a. forming a channel through the membrane.
b. initiating the replication of the genetic material.
c. binding to a substance to carry it through the membrane.
d. acting as a receptor for substances external to the cell.
e.increasing the rate of a chemical reaction.

b

Whether a molecule can cross the plasma membrane depends upon
a. the size of the molecule
b. the shape of a molecule
c. the chemical properties of the molecule
d. the charge of the molecule
e. all of the above

e

Which is the best definition of diffusion?
a. movements of molecules from an are of their higher concentration to an area of their lower concentration
b. movement of water across a semipermeable membrane from an area of high water concentration to an area of lower water concentration.
c. movement of molecules from an area of their lower concentration to an area of their higher concentration
d. movement of water across a semipermeable membrane from an area of low water concentration to an area of higher water concentration.
e. movement of a substance against its concentration through the release of energy from ATP.

a

Which is the best definition of osmosis?
a. movements of molecules from an are of their higher concentration to an area of their lower concentration
b. movement of water across a semipermeable membrane from an area of high water concentration to an area of lower water concentration.
c. movement of molecules from an area of their lower concentration to an area of their higher concentration
d. movement of water across a semipermeable membrane from an area of low water concentration to an area of higher water concentration.
e. movement of a substance against its concentration through the release of energy from ATP.

b

If a cell is placed in a hypotonic solution, which will occur?
a. salts will move into the cell from the surrounding colution.
b. water will move into the cell from the surrounding solution.
c. salts willm ove out of the cell into the surrounding solution.
d. water willm ove out of the cell into the surrounding solution.
e. none of the choices will occur.

b

If a cell is placed in a hypertonic solution, which will occur?
a. salts will move into the cell from the surrounding solution.
b. water will move into the cell from the surrounding solution.
c. salts will move out of the cell into the surrounding solution,
d. water will move out of the cell into the surrounding solution.
e. none of the choices will occur.

d

If a cell is placed in an isotonic solution, which will occur?
a. salts will move into the cell from the surrounding solution.
b. water will move into the cell from the surrounding solution.
c. salts will move out of the cell into the surrounding solution,
d. water will move out of the cell into the surrounding solution.
e. none of the choices will occur.

e

____ is the shrinking of cytoplasm due to osmosis.
a. plasmolysis
b. endocytosis
c. crenation
d. diffusion
e. turgor

a

Which is the best definition of active transport?
a. movements of molecules from an are of their higher concentration to an area of their lower concentration
b. movement of water across a semipermeable membrane from an area of high water concentration to an area of lower water concentration.
c. movement of molecules from an area of their lower concentration to an area of their higher concentration
d. movement of water across a semipermeable membrane from an area of low water concentration to an area of higher water concentration.
e. movement of a substance against its concentration through the release of energy from ATP.

e

The sodium-potassium pump moves sodium and potassium ions across the plasma membrane by
a. facilitated transport
b. active transport
c. cotransport
d. endocytosis
e. exocytosis

b

Surgars and amino acids are carried into the cell by means of
a. facilitated transport
b. active transport
c. cotransport
d. endocytosis
e. exocytosis

a

The process by which cholesterol is transported into the cell by binding of LDL to its receptor and the internalization of the receptor-LDL complex is
a. facilitated transport
b. active transport
c. cotransport
d. endocytosis
e. exocytosis

d

Cell products are secreated from the cell through
a. facilitated transport
b. active transport
c. cotransport
d. endocytosis
e. exocytosis

e

Pinocytosis is an example of
a. facilitated transport
b. active transport
c. cotransport
d. endocytosis
e. exocytosis

d

Which of the following is not associated with animal cells?
a. an extracellular matrix
b. plasmodesmata
c. gap junctions
d. adhesion junctions
e. tight junctions

b

A Major chemical that functions to stiffen animal cell membranes and thus regulates the fluidity of the animal cell membrane is
a. cholesterol
b. lipid in nature
c. a steroid
d. all of the choices are correct

d

proteins in a membrane are
a. peripheral if they are on the inside surface help in place by cytoskeleton
b. integral if they are embedded in the membranes
c. integral if they protrude from only one surface of the bilayer
d. all of the choices are correct

d

active transport
a. require an input of ATP
b. is involved in diffusion
c. occurs in osmosis and facilitate transport
d. all of the choices are correct

a

A red blood cell placed in 50% NaCl solution will
a. undergo crenation
b. swell and eventuall burst due to water intake
c. stay the same size
d. none of the choices are correct

a

If phagocytosis can be compared to cellular eating, the pinocytosis can be compared to
a. cellular elimination
b. cellular drinking
c. cellular dehydration
d. none of the choices are correct

b

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