Cell Structure

Chapter 3
Which scientist determined that cells come only from other cells?
Answer: Greater than that of a larger cell
The surface-area-to-valume ratio of a small cell is ?
meter (m)
In the metric system, a micrometer (um) is equal to 0.000001 (one millionth) of a ____?
receptor protein
A protein on the cell membrane that recognizes and binds to specific substances is called a(n) ___?
answer: increases
As a cell becomes smaller, its surface-area-to volume ratio ___?
Which of the following instruments produces highly magnified three-dimensional images of a cell's surface?
answer: produce ATP
In a eukaryotic cell, mitochondria _____?
answer: cell membrane
A cell's boundary is called the _______ ___________?
answer: cell wall
In a bacterium, the _____ ______ provides structure and support.
answer: transport proteins
_________ __________ in the cell membrane aid the movement of substances into and out of a cell.
answer: central vacoule
In plant cels, rigidity is provided by a large, membrane-bound sac called the ___ _____.
answer: nucleus pores
______ ______ allow certain substances to pass into and out of the nucleus of a cell.
answer: lysosomes
______ are vesicles that contain a cell's digestive enzymes.
answer: polar, non-polar
The "head: of a phospholipid is _______, so it is attracted to water, while the "tails" are ________, so they are repelled by water.
answer: 500
If a compound microscope has a 50x objective lens and a 10x ocular lens, a viewed image appears _____ times larger than its actual size.
cell membrane, cytoplasm, ribosomes, DNA.
All cells have a _____, _____, _____, _____.
lack a nucleus and membrane-bound organellas
Prokayrytic cells _____ and _____.
cell wall
Prokaryotes have _____, _____.
Prokaryotes have single loop of _____.
Prokaryotes contain _____.
Some Prokaryotes have _____.
Some prokaryotes have _____.
Some prokaryotes have _____.
True nucleus
Hydrophilic (water loving)
the phosphate head is attracted to water and is called _____.
Hydrophobic (water fearing)
The lipid tails are repelled by water and are termed _____.