The main structure of the plasma membrane is called the phospholipid bilayer
____ are thin, microscopic projections extending from the surface of the
... [Show More] plasma membrane. They are smaller than cells microvilli
Identify the parts of a cell Identify the parts of a cell
Which statements characterize organelles? They are generally located within cells; Each type of organelle has a specific function, They play roles in growth, repair, and cellular maintenance
Gap junctions are bridge by proteins called connexons
The Na-K exchange pump is a special type of ion pump called an ____ pump because it moves one type of ion into a cell ____ its concentration gradient and another type of ion out of the cell ____ its concentration gradient. exchange, against, against
Forms of passive transport across cell membranes are diffusion and osmosis
Put the steps of transcription into order: elongation (RNA polymerase forms an RNA copy of the gene), initiation (DNA is unwound and RNA polymerase attaches to the promoter of the gene), and termination (the RNA strand is released from the DNA strand). initiation (DNA is unwound and RNA polymerase attaches to the promoter of the gene), elongation (RNA polymerase forms an RNA copy of the gene) , and termination (the RNA strand is released from the DNA strand).
Identify the structures of the nucleus Identify the structure of the nucleus
The inside of the cell is relatively more ____ than the outside of the cell. negative
The ____ is the "control center" of cellular activities in a cell nucleus
In the cell cycle, division of the nucleus is called mitosis
In cell division, one cell divides to produce two identical cells. These new cells are called ____ cells. daughter
A resting membrane potential is essential in the normal function of ____ cells. muscle and nerve
Chromatin is composed of ____. DNA and proteins
Transport (shuttle) vesicles are produced within a cell by rough ER
The ____ gradient is dependent on the combination of the ____ gradient and the chemical concentration gradient. electrochemical, electric
Which are common cell shapes? column-like, cube-like, spherical
Match the non-membrane-bound organelles with their function. Match the non-membrane-bound organelles with their function.
____ cells include all of the cells in the body except sex cells somatic
Cells similar in structure and function are arranged into structural units called ____ tissues
Which statements correctly describes the nuclear envelope? It is continuous with the ER, It is a double membrane, It controls the entry of substance into and out of the nucleus, It contains phospholipids
Osmosis if a type of ____ passive transport
Rapid digestion of a cell by its own lysosomes is called ____. autolysis
____ is the cell division that takes place in somatic cells mitosis
Which statements describe chromosomes? They are more condensed than chromatin, They contain DNA and proteins
____ are protein-digesting organelles in the nucleus and cytosol of cells proteasomes [Show Less]