Practice Quiz Flashcards by Alexis Haberly

Crenation of a red blood cell may occur when it is placed in a \_\_\_\_ solution
A.neutral
B. Isotonic 
C. Hypertonic 
D.hypotonic

C. Hypertonic

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Which of the following best describes the structural arrangement of cellular membranes
A.solid,rigid layer of phospholipid with loosely bound protein molecules

B. A fluid bilayer of phospholipid molecules in which protein molecules are floating

C.strong layers of protein molecules where carbonhydrate molecules freely float

D.three layers: lipid on the inside,protein in the middle and carbonhydrates (and polysacharrides) on the outside

B. A fluid bilayer of phospholipid molecules in which protein molecules are floating

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Ribosomes are produced in the
A. Cytoplasm
B.golgi complex 
C. Rough ER
D. Nucleolus

D.nucleolus

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Which of the following is a function of ribosomes on the rough ER? 
A.produce steroids 
B.package hydrolytic enzymes
C.store calcium 
D.synthesis of proteins

D.synthesis of proteins

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Which of the following processes do not require use of cellular energy?
A.phagocytosis
B.phagocytosis
C.cellular pumps
D.diffusion

D.diffusion

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Mitochondria are called the power houses of the cell because their main function is
A.generating ATP
B. Homeostasis
C.hydrolysis 
D.motility

A. Generating ATP

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Proteins are packaged for secretion by the 
A.golgi complex
B.nucleoli
C.ribosomes
D.nucleosomes

A.golgi complex

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If the concentration of solute a in the fluid outside a cell is lower then concentration inside
A. Water will tend to enter cell by active transport
B. Water will leave the cell my osmosis
C.glucose will tend to enter the cell my osmosis
Water will tend to enter the cell my osmosis

D. Water will tend to enter the cell my

Osmosis

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A transport process that does not require the expenditure of cellular energy is 
A.facilitated diffusion
B.phagocytosis 
C.receptor mediated endocytosis 
D.active transport

A. Facilitated diffusion

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DNA replicates during 
A.prophase 
B.telophase
C.interphase
D.metaphase

C. Interphase

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Ribosomes mRNA and tRNA all have one thing in common they all 
A. Are found in the nucleus 
B.are produced by nucleoli 
C.function in translation 
D. Move through ion channels

C. Function in translation

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The movement of water across a selectively permeable membrane from a area of higher water concentration to an area of lower water concentration is called 
A. Diffusion
B.osmosis
C.endocytosis
D. Facilitated diffusion

B. Osmosis

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Channels (pores) and transporters in the cytoplasmic membrane are made up of
A.integral proteins
B.lipids
C.cholesterol

A.integral proteins

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The molecules that make up most of the plasma membrane are
A.proteins
B.cholesterol
C.glycoproteins
D. Phospholipids

D.phospholipids

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In primary active transport
A. Glucose is moved across membranes with sodium ions
B.energy derived from ATP directly moves a substance across a membrane
C.symports and antiports are involved
D.smyport of calcium and glucose

B. Energy derived from ATP directly moves a substance across a membrane

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In excytosis \_\_\_\_\_\_ unite with the plasma membrane and release their contents to the outside of the cell
A.phagosomes
B.secretory vesicles
C.endosomes
D.pinocytic vesicles

B. Secretory vesicles

Chemically the cytosol is 75-90 percent \_\_\_\_
A. Water
B.protein
C.phospholipid
D.sodium ions

A. Water

Some endoplasmic reticulum appears rough because
A.large proteins are attached to the surface
B. It is still in the process of formation
C.ribosomes are attached to the surface
D.it is digesting molecules

C.Ribosomes are attached to the surface

Mitochondria are numerous in cells 
A.protect the body
B.are located in the intestines
C.communicate with the external environment 
D.have a high rate of ATP utilization

D. Have a high rate of ATP utilization

Numerous short projections from the surface of cells of the respiratory tract are called
A.flagella
B.microtubles
C.cilia
D.hydrophilic head

C.cilia

The process of translation terminates when
A. The large ribosomal subunit attaches the small subunit
B. The stop codon of the mRNA enters the ribosome
C.ATP is no longer available
D. DNA no longer produces mRNA

B. The stop codon of the mRNA enters the ribosome

Somatic cell division involves the nuclear division called
A.cytokinesis
B.mitosis
C.meiosis
D.fission

B.mitosis

During interphase of cel division 
A.cleavage furrow develops
B.the DNA replicates
C. The nuclear membrane disappears
D.the centrioles separate

B. The DNA replicates

When cytokinesis is complete \_\_\_\_\_ begins 
A.interphase
B.prophase
C.metaphase 
D.anaphase

A. Interphase

In active transport across a plasma membrane A. A substance is moved from where it is concentrated to where it is more concentrated B.a substance is moved from where it is more concentrated to where it is less concentrated C. There is a net movement of solvent through the membrane D. The energy source is kinetic (thermal) energy

A. A substance is moved from where it is less concentrated to where it is more concentrated

Gametes are most different from other cells of the body because A.their size B.their shape C.the method of metabolism D.the number of chromosomes in the their nuclei

D. The number of chromosomes in their nuclei

``` The organelle that packages proteins such as the hormone insulin, into secretory vesicles that can undergo excytosis is the A.lysosome B.smooth endoplasmic reticulum C.nucleolus D. Golgi complex ```

D. Golgi complex

Apoptosis is A. A process in which free radicals are produced during normal aging B.an abnormal type Of cell division in which cdc2 proteins are cycling promote proliferation of cells C.a normal type of cell death that helps maintain an appropriate number of cells in each tissue D. A pathological type of cel death that results from injury of a tissue

C. A normal type of cel death that helps maintain am appropriate number of cells in each tissue

``` A neoplasm that does not metastasize is called a A.malignant tumor B:benign tumor C.carcinogen D.carcinoma ```

B.benign tumor

``` A carcinogen is A. A virus B.an oncogene C. A chemical agent or radiation that causes cancer D. A mutation ```

C. A chemical agent or radiation that causes cancer

Substances in our diet such a vitamin E,vitamin C and bete- carotene may slow the process of aging by A. Reducing the rate of mutation B.stimulating cel divisions of nerve cells C.inhibiting free radical formation D.reducing uv damage of the skin cells

C.inhibiting free radical formation

Which of the following is NOT a function of the proteins associated with the cell membrane A.regulates the passage of ions in and out of the cell B.acts as a carrier molecule for various compounds C.acts as a receptor of certain hormones D.produces energy for the cell

D.produces energy for the cell

``` Which of the does NOT require the cell to expend its own ATP? A.facilaited diffusion B.phagocytosis C.endcytosis D.pinocytosis ```

A. Facilitated diffusion

``` A 0.89% saline solution is isotonic for RBCs. If a RBC is placed in a 10% saline solution it will (hypertonic) A. Hemolysis B.crenation C.bursting D.lyses ```

B.crenation

Which of the following events occur during anaphase of mitosis A.cytokinesis B.chromatid pairs line up at equatorial plane C.chromosomes move to opposite poles of cell D.chromatin shortens into chromosomes

C.chromosomes move to opposite poles of cell

``` Integral proteins are part of the : A. Cytoplasm B.nucleolus C.plasma membrane D.cytosal ```

C. Plasma membrane

``` Which organelle inactives or detoxifies drugs in liver cells? A. Rough endoplasmic reticulum B.smooth endoplasmic reticulum C.mitochondrion D.ribosome ```

B. Smooth endoplasmic reticulum

``` The basic living unit of structure and function of any living organism is the a.organelle b.tissue c.organ D.cell ```

D. Cell