chapter 7&8 test

Question 0

bacteria lack nuclei and therefore also lack genetic material

Answer 0

false

Question 1

gram-negative bacteria have a thick layer of peptidoglycan that stains purple

Answer 1

false

Question 2

although viruses do not consist of cells, biologists consider them to be living because they are capable of reproduction

Answer 2

false

Question 3

viruses consist of RNA and DNA surrounded by a coat of protein

Answer 3

true

Question 4

people can contract the influence virus more than once because the virus tends to mutate rapidly, avoiding the actions if the immune system

Answer 4

true

Question 5

chickenpox and shingles are caused by the same virus

Answer 5

true

Question 6

what type of cell does not have a cell wall

Answer 6

animal cell

Question 7

folded membranes are an advantage to a cell because we

Answer 7

cell processes can be more efficient, the membranes provide a large surface area, the membranes form interconnected compartments

Question 8

who concluded that all plants are made up of living cells?

Answer 8

schleiden

Question 9

all living things are made up of…

Answer 9

cells

Question 10

what do electron microscopes use to focus and magnify an image?

Answer 10

electromagnets

Question 11

each of the following is a main idea of the cell theory except…

Answer 11

all cells are similar in structure and function

Question 12

the scientist who first described living cells as seen through a simple microscope was

Answer 12

van Leeuwenhoek

Question 13

one advantage of electron microscopes over light microscopes is their

Answer 13

higher magnification

Question 14

if a cell contains a nucleus, is must be a(n) ____ cell

Answer 14

eukaryotic

Question 15

because calls have a watery environment both inside and outside, the pilaf ends of the phospholipids in the plasma membrane form ____ layers

Answer 15

double

Question 16

the fluid mosaic model describes a structure with…

Answer 16

polar layers on the outside and non polar layer on the inside

Question 17

because the phospholipid molecules and some proteins are free to move, the plasma membrane is said to be a…

Answer 17

fluid mosaic

Question 18

a cells contents would be the same as it surrounds, were it not for

Answer 18

selective permeability

Question 19

a plasma membrane is made up of a(n)

Answer 19

lipid bilayer

Question 20

water moves into a cell placed in a(n) ____ solution

Answer 20

hypotonic

Question 21

if cells are placed in a strong sugar solution, water will

Answer 21

pass from the cells to the sugar solution

Question 22

a fell moves particles from a region of lesser concentration to a region of higher concentration by ____

Answer 22

active transport

Question 23

if it’s not watered, a tulip plant wilts because it

Answer 23

loses turgor pressure

Question 24

if a cell is placed in salt water, water leaves the cell by...

Answer 24

osmosis

Question 25

which if the following is not a form of passive transport

Answer 25

endocytosis

Question 26

the structure most responsible for maintaining cell homeostasis is the...

Answer 26

plasma membrane

Question 27

bacteria are used in

Answer 27

farming, the food industry, the medical industry

Question 28

viruses are found in

Answer 28

air, water, soil

Question 29

vectorial are the only organisms characterized as

Answer 29

prokaryotic

Question 30

when tested with a gram stain, gram-negative bacteria are stained...

Answer 30

pink

Question 31

The study of viruses is a part of biology because

Answer 31

they are active inside living cells

Question 32

The capsid of a virus is the

Answer 32

protective outer coat

Question 33

cell structures that contain digestive enzymes are

Answer 33

lysosomes

Question 34

in a cell, the sites of protein synthesis are the

Answer 34

endoplasmic reticulum

Question 35

The small, membrane-bound structures inside the cell are

Answer 35

organelles

Question 36

The movement of material into and out of the cell is controlled by the

Answer 36

plasma membrane

Question 37

an organism with the cell that lacks a true nucleus is a

Answer 37

prokaryote

Question 38

in a cell, the breakdown of molecules in order to release energy occurs in the

Answer 38

mitochondria

Question 39

short, hair-like projections use for locomotion are

Answer 39

cilia

Question 40

implants, the structures that transform light energy into chemical energy are called

Answer 40

chloroplasts

Question 41

The pigment that gives plants their green color is

Answer 41

chlorophyll

Question 42

The functions of a eukaryotic cell are managed by the

Answer 42

nucleus

Question 43

cell wall

Answer 43

rigid structure that provides additional support and protection

Question 44

plasma membrane

Answer 44

selective boundary between the cell and its environment

Question 45

nucleus

Answer 45

contains the directions to make proteins

Question 46

nucleolus

Answer 46

makes ribosomes

Question 47

endoplasmic reticulum

Answer 47

site of cellular chemical reactions

Question 48

ribosomes

Answer 48

sites where the cell of assembles enzymes and other proteins according to the directions of DNA

Question 49

Golgi apparatus

Answer 49

packages proteins for shipment

Question 50

vacuoles

Answer 50

membrane-bound spaces that temporarily store materials

Question 51

lysosomes

Answer 51

digests unneeded cell parts

Question 52

chloroplast

Answer 52

plant organelle that captures light and turns it into energy

Question 53

mitochondria

Answer 53

membrane-bound organelles that transform energy for the cells in plants and animals

Question 54

cytoskeleton

Answer 54

support structure

Question 55

cilia

Answer 55

short and hairlike things that beat together to move the cell

Question 56

flagella

Answer 56

Long and whiplike; moves back-and-forth to move the cell

Question 57

rough endoplasmic reticulum

Answer 57

has ribosomes

Question 58

smooth endoplasmic reticulum

Answer 58

does not have ribosomes. Makes lipids and detoxifies the cell

Question 59

Isotonics solutions

Answer 59

stay the same

Question 60

hypotonic solutions

Answer 60

burst

Question 61

hypertonic solutions

Answer 61

Red blood cells will shrivel and become spiky