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Biology Chapter 7
Biology Chapter 7
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Prentice Hall Biology Chapter 7.1-7.4 #biology #science # cells
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Answers
1
What is the cell wall?
a strong supporting layer around the membrane
a thin flexible barrier that surrounds a cell
a double-layer sheet
2
Who was Theodor Schwann?
the first person who saw microorganisms in water
concluded that all plants were made of cells
coined the term "cells"
stated that all animals were made of cells
3
What is an organ?
many groups of tissues that work together
a group of similar cells that perform a particular function
group of organs that work together to complete a task
4
The Mitochondria are organelles that convert chemical energy stored in food into...
enzymes
energy
compounds that are more convenient for cells to use
5
Chromatin is the granular material located in the nucleus? TRUE or FALSE
TRUE
FALSE
6
Why are the pancreatic cells specialized?
well developed Golgi apparatus; storage vacuoles w/ enzymes
it produces enzymes that make it easier to digest food
all of the above
possesses large amounts of other organelles
7
What is facilitated diffusion?
particles move from a high concentrated area to a lesser one
the movement of specific molecules across the cell membrane
diffusion of water through a selectively permeable membrane
8
What is a prokaryote?
a cell that does contain a nuclei
a cell that does not contain a nuclei
a fundamental concept of biology
the basic unit of life
9
What does SEM stand for?
Semi-transmitted electron microscope
Scanning electron microscope
10
Who was Robert Hooke?
concluded that all plants were made of cells
a scientist who was the first to see microorganisms in water
coined the term "cells" we use in biology today
stated that all animals were made of cells
11
What is a eukaryote?
a cell that does not contain a nuclei
the basic unit of life
a fundamental concept of biology
a cell that does contain a nuclei
12
The Endoplasmic Reticulum is where lipid components of the cell membrane are assembled and...
proteins and other materials that are exported from the cell
energy is stored
where small organelles are filled with enzymes
13
What is a lipid bilayer?
a strong supporting layer around the membrane
a thin flexible barrier that surrounds the cell
a double-layer sheet (cell membrane's composition)
14
What are centrioles?
all of the above
An organelle near the nucleus in animal cells
occurs in pairs; involves in the creation of spindle fibers
15
What does TEM stand for?
Translation of electrons microscope
Transmission electron microscope
16
What are microtubules?
are structures made up of the protein actin
are hollow structures made up of the protein tubulins
17
What is the cell membrane?
a thin flexible barrier that surrounds a cell
a strong supporting layer around the membrane
18
Why are red blood cells specialized cells?
because they transport oxygen
because they are red, due to iron
because they are isotonic
19
What can't a TEM microscope do?
does not have to be cut into small thin slices
have two-dimensional images of cells
can explore cell structures and large molecules
20
Golgi Apparatus modifies, sorts, and packages proteins and other materials from the ER? T or F
True
False
21
Guard cells are an example of what?
specialized animal cells
specialized plant cells
22
what are cells?
cells that contain nuclei
the basic unit of life
a fundamental concept of biology
cells that do not contain nuclei
23
Chloroplasts are organelles that capture energy from sunlight and convert it into...
chemical energy
chlorophyll
small organelles
compounds
24
Vacuoles a space within the cytoplasm, enclosed by a membrane containing fluid? T or F
True
False
25
What can't a SEM microscope do?
produce three-dimensional images of cells
beam of electrons that scans over the surface of a speciman
specimens do not have to be cut in small slices
can view living cells
26
Pinocytosis are tiny pockets that form along the cell membrane? TRUE or FALSE
FALSE
TRUE
27
What is Exocytosis?
The process of taking material into the cell
material that is moved in the opposite direction
the release of large amounts of material from the cell
28
What is isotonic?
When one solution has "below strength"
When one solution has "above strength"
When two solutions have the "same strength"
29
What is osmosis?
diffusion of water through a selectively permeable membrane
when one solution has "high strength"
when one solution is "below strength"
when two solutions have the "same strength"
30
What are lysosomes?
organelles that capture sunlight
convert chemical energy into stored food
none of the above
small organelles filled with enzymes
31
What are chromosomes? hint: more than one answer
carries genetic information
small organelles filled with enzymes
structure of nucleic acids and proteins found in the nucleus
the double membrane surrounding the nucleus
32
What is a tissue?
group of organs that work together to complete a task
a group of similar cells that perform a particular function
many groups of tissues that work together
33
What is the nuclear envelope?
the granular material located in the nucleus
the basic unit of life
the assembly of ribosomes begin
the double membrane surrounding the nucleus
34
What is Equilibrium?
the concentration is the same throughout a system
the concentration of the solute is not the same throughout
35
Red blood cells and the pancreas are examples of what?
specialized plant cells
specialized animal cells
36
What is cell specialization?
cells change into specific cells meant to do certain tasks
a group of similar cells that perform a particular function
a group of organs that work together to perform a task
many groups of tissues that work together
37
Cytoplasm is the portion of the cell outside of the nucleus? TRUE or FALSE
TRUE
FALSE
38
What are ribosomes?
particles of RNA and protein found throughout the cytoplasm
organelles that convert energy
the assembly of ribosomes beign
the portion of the cell outside the nucleus
39
Who was Matthew Schleidan?
coined the term "cells"
was the first person to see bacteria
concluded that all animals were made of cells
stated that all plants were made of cells
40
Who was Antwon can Leeuwenhoek?
stated that all animals were made of cells
concluded that all plants were made of cells
the first person to see microorganisms in pond water
coined the term "cells" we now use in biology today
41
What is active transport?
material that is moved in the same direction
material that is moved in the opposite direction
42
What is the nucleolus?
the assembly of ribosomes
the granular material located in the nucleus
the double membrane surrounding in the nucleus
small organelles that are filled with enzymes
43
What is an organ system?
group of organs that work together to perform a certain task
many groups of tissues that work together
a group of similar cells that perform a particular task
44
Endocytosis is the process of taking material into the cell by...
creating tiny pockets that form along the cell membrane
the extension of cytoplasm that surrounds a particle
means of infoldings of the cell membrane
releasing large amounts of material from the cell
45
What is Scanning Probe Microscopes?
produces images by tracing the surfaces of samples
all of the above
make it possible to observe a single atom
uses a fine probe
46
What are organelles?
the double membrane surrounding the nucleus
the granular material located in the nucleus
the portion of the cell outside the nucleus
number of organized or specialized structures within a cell
47
What is hypotonic?
When two solutions have the "same strength"
When one solution has "above strength"
When one solution has "below strength"
48
What is hypertonic?
When one solution has "above strength"
When one solution has "below strength"
When two solutions have the "same strength"
49
What is not the function of microfilaments?
are important in cell division
form extensive networks in some cells
produce a tough, flexible framework that supports the cell
are structures made up of the protein actin
50
What is the cell theory?
cells that do not contain nuclei
cells that contain nuclei
the basic unit of life
a fundamental concept of biology
51
What is not the function of the cytoskeleton?
a network of protein filaments and tubules in the cytoplasm
a granular material found in the nucleus
gives the cell internal structure
gives the cell shape
52
Why are guard cells specialized?
it regulates the exchange of tiny gases through the stomata
it helps protect the stomata from the exchange of gases
53
What is a nucleus?
large membrane structure that contains genetic material DNA
cells that do not contain nuclei
cells that contain nuclei
the basic unit of life
54
What is Phagocytosis? hint: more than one answer
packages a particle within a food vacuole
extensions of cytoplasm that surround a particle
The process of taking material into the cell
55
What is diffusion?
When particles move from a low concentration to a high one
When particles move from a high concentration to a low one
When particles stay where they are
56
Is a concentration the mass of a solute in a given volume of a solution? TRUE or FALSE
TRUE
FALSE
