Quiz 3 corrections Flashcards
(25 cards)
not organelles in a typical eukaryotic cell?
enzymes and molecules
The environment inside the plasma membrane is a semifluid material called the _.
cytoplasm
Which is a supporting network of long, thin protein fibers that form a framework for the cell and provide an anchor for the organelles inside the cells?
cytoskeleton
What is a microfilament?
thin protein threads that give the cell shape
A _____ is an organelle made of microtubules that functions during cell division.
centriole
True or false: Ribosomes, endoplasmic reticulum, vacuoles, mitochondria, chloroplasts, and centrioles are typical organelles in a eukaryotic cell.
true
Which organelle is made of microtubules that functions during cell division?
Centriole
Which cell structures are short, numerous projections that look like hairs?
Cilia
The ______ is a thick, rigid, mesh of fibers that surrounds the outside of the plasma membrane, protects the cell, and gives it support.
Cell wall
Which are the functions of the prokaryote cell wall?
Protect the cell
give cell support
_____are projections that are longer and less numerous than cilia, with a whip-like motion.
flagella
What substance makes up the cell wall?
peptidoglycan
Which is found within the nucleus and is the site of ribosome production?
transport proteins
Which theory states that cells are the basic unit of life, organisms are made up of one or more cells, and all cells come only from other cells?
Cell theory
Select statements that are true regarding facilitated diffusion.
1Facilitated diffusion requires added energy input because particles move from an area of low concentration to an area of higher concentration.
2 Facilitated diffusion uses carrier proteins and channel proteins to move ions and small molecules across the plasma membrane.
3 Facilitated diffusion requires no added energy input because particles move from an area of high concentration to an area of lower concentration.
Facilitated diffusion uses carrier proteins and channel proteins to move ions and small molecules across the plasma membrane.
Facilitated diffusion requires no added energy input because particles move from an area of high concentration to an area of lower concentration.
Suppose two sides of a container are separated by a selectively permeable membrane. Water can pass through the membrane, but sugar can not pass through the membrane. Both sides are filled with solutions of sugar water. However, the solution on the left side of the container has a greater concentration of sugar molecules than the solution on the right side of the container. Which describes what will happen in the container?
the water will diffuse right to left till they’re equal
When water moves into and out of a cell at the same rate, and a cell retains is normal shape, the cell is most likely in a(n) ____solution
isotonic
____ is the net movement of particles from an area where there are many particles of the substance to an area where there are fewer particles of the substance.
Diffusion
True or false: The process of diffusion requires additional energy input.
false
True or false: Facilitated diffusion requires no additional input of energy because the particles are moving from an area of high concentration to an area of lower concentration.
true
effects on a cell in a hypertonic solution?
Animal cells in a hypertonic solution will shrivel.
The net movement of water is out of the cell.
The net movement of particles from an area where there are many particles of the substance to an area where there are fewer particles of the substance is known as ___.
diffusion
Which statement correctly explains a difference between the cells of prokaryotes and the cells of eukaryotes?
Eukaryotic cells have a nucleus and membrane-bound organelles; prokaryotic cells lack these features.
A microscope with a 4x objective lens and a 10x ocular lens produces a total magnification of
40x
