5:10 Flashcards
What are the functions of mRNA, tRNA, and rRNA?
Messenger RNA sends message for the protein
needing to be built. Transfer RNA escorts amino acids needed to build the specific protein.
Ribosomal RNA synthesizes the protein
What is the structure of a cell membrane?
Double phospholipid membrane. Hydrophilic (likes water)
heads face the outside while hydrophobic (water hating) tails face the inside
Give the function of the main cell parts:
cell membrane-
maintains cell structure and allows only certain materials to pass into the cell
nucleus:
control center of cell and contains DNA
cytoplasm:
maintains cell shape and acts as a medium for substances to pass through, holds
organelles in place
What are hypertonic and hypotonic solutions, and what happens when a cell goes into a hypertonic
solution? A hypotonic solution?
Hypertonic is a solution with a high concentration of solutes, and
hypotonic is a solution without many solutes (contains mostly water). In a hypertonic solution, a cell undergoes crenation (shrinking). In a hypotonic solution, the cell undergoes cytolysis (swelling and
bursting).
What happens during the two main phases of the cell cycle?
Interphase and mitosis. Interphase is when basic metabolic functions occur and DNA replication occurs. Mitosis is the cell division
What are the 4 stages of mitosis, in order?
Prophase, metaphase, anaphase, telophase
What are some characteristics of epithelial tissue, and how are they classified?
They line a space,
cells are closely packed together, avascular. They are classified based on layers (simple or stratified)
and cell shape (squamous, cuboidal, columnar, etc)
What are some characteristics of connective tissue, and give some examples.
Connects other tissue
types, cells are scattered in a background matrix, usually contain fibers. Examples are adipose,
blood, bone, cartilage, etc
