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Dur to the role smooth ER plays in cholesterol metabolism, the cells of which organ should contain many of these organelles: a)kidney b)spleen c)liver d)adrenal gland e)fat cells
which of the following correctly describes tRNA: a)it stands for total RNA b)it works with ribosomes in protien synthesis c)it transfers messges from genes to mRNA d)it transfers messages from proteins back to genes e)it is the only kind of RNA that is single stranded
a gene under goes ___ to produce its correspodning mRNA: a)transference b)replication c)translation d)transcription e)interference
a codon on mRNA is a sequence of ___: a)three amino acids arranged in tandem b)six amino acids arranged in tandem c)three bases that code for a specific amino acid d)six bases that code for a specific amino acid e)random bases that code for a gene
Pancreatic cells produce large amounts of insulin, with is synthesized in the _______ of the cell: a)peroxisomes b)nucleus c)nucleolus d)mitochondria e)cytoplasm
in which of the following locations is cardiac muscle found: a)lining of the urinary system b)capillary walls c)bone d)spinal cord e)heart
the plasma membrane: a)is the gene-containing control center that directs all cellular activities b)regulates the entry and exit of cell membranes c)is the site of most cellular activities d)is the site where ribosomes are assembled prior to their migration into the cytoplasm e)defines the limits of the nucleus
a human cell culture is placed in a relatively concentrated salt solution. Which of the following is likely to occur: a)water moves out of the cell by osmosis b)water moves into the cell by osmosis c)salt moves out of the cell by diffusion d)salt moves into the cell by diffusion e)the cell will remain unchanged
DNA replication occurs ___________: a)in the cytoplasm b)only in the presence of RNA c)during interphase d) in ribosomes e)during cytokinesis
which of the following correctly describes metaphase of mitosis: a)daughter chromosomes are pulled towards the poles b)a cleavage furrow begins to form c)the nuclear envelope is formed again d)the cell stays dormant e)chromosomes are aligned in the center of the cell
Upon DNA replication, a double stranded DNA molecule gives rise to: a)single straned DNA molecule b)two single stranded DNA molecules c)two double stranded DNA molecules d)two mRNA molecules e)two tRNA molecules
which of the following best describes the flow of genetic information in the cell: a)DNA-mRNA-protein b)mRNA-DNA-protein c)tRNA-DNA-protein d)DNA-tRNA-mRNA-protein e)DNA-protein
smooth muscle is found in the: a)heart muscle b)intestine c)muscle of the upper arm d)liver e)kidney
which of the following correctly describes smooth muscle tissue: a)they are voluntary muscles b)they are involuntary muscles c)they connect muscles to bones d)they connect muscles to bones d)they connect bones to bones e)their function is to store fat
the primary lipids found in the cell membrane are: a)fat-soluble vitamins and neutral lipids b)fat-soluble vitamins and cholesterol c)neutral lipids and cholesterol d)neutral lipids and glycolipids e)phospholipds and cholesterol
the molecules in the cell membrane that serve as receptors or binding sites for hormones or other chemical messengers are the: a)nucleic acids b)proteins c)cholesterol molecules d) carbohydrates e)lipids
all of the following are found in the nucleus except: a)DNA b)chromatin c)nucleolus d)centrioles e)chromosomes
two types of passive transport are: a)osmosis and endocytosis b)endocytosis and diffusion c)diffusion and filtration d)filtration and exocytosis e)exocytosis and endocytosis
which of the following correctly describes the extracellular matrix: a)non-living materialthat surrounds the cell b)living material that surrounds the cell c)non-living material that is found in the cytoplasm d)living material that is found in the cytoplasm e)nucleoplasm found int he nucleus
two types of active transport are: a)simple diffusion and cellular secretion b)cellular secretion and facilitated diffusion c)facilitated diffusion and phagocytosis d)solute pumping and bulk transport e)bulk transport and filtration
the nucleic acid responsible for bringing the amino acids to the "factory" site for protein formation is the: a)rRNA b)mRNA c)tRNA d)DNA e)ATP
the phase in the cell life cycle that can best be described as the metabolic phase is ________..
microfilaments play a role in producing changes in cell shape and are important in the function of _______ cells.
because the plasma membrane allows some substances to pass through while others are excluded means it is _________.
name the organelle/part of the cell that corresponds to:controls the entry and exit of substances through the cell:
name the organelle/part of the cell that corresponds to: fingerlike-projections that increase surface are for absorption:
name the organelle/part of the cell that corresponds to:cholesterol synthesis, fat metabolism and detoxification:
name the organelle/part of the cell that corresponds to:where numerous ribosomes are attached:
name the organelle/part of the cell that corresponds to: fluid that suspends the organelles in the cell:
name the organelle/part of the cell that corresponds to: contains enzymes that digest non-usable materials in the cell:
name the organelle/part of the cell that corresponds to: carries out cellular respiration:
true or false: osmosis the movement of solutes from a region of lower concentration of solute to a region of higher concentration of solute
true or false: DNA replication and transcription occur during the same phase of the cell life cycle
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