exam ch 7

Question 1

what is the magnification of a compound light microscope that uses a 10x lens in series with a 25x lens

Answer 1

250x

Question 2

which is not a part of the cells theory?

Answer 2

cells are produced spontaneously as an organism

Question 3

robert hooke and anton van leeuwenhoek designed microscopes that enable them to see organelles within the cells they observed. (true/false)

Answer 3

false

Question 4

which type of electron microscope directs electrons over the surface of a nonliving specimens, producing a three-dimensional image?

Answer 4

scanning tunneling electron microscope

Question 5

which term describes the function of proteins found on the outer surface of the plasma membrane?

Answer 5

receptors

Question 6

what is the function of carbohydrates that stick out from the outer surface of the plasma membrane?

Answer 6

they give the cell shape and enable it to move

Question 7

which organelle is similar to the section of the factory that organizes, boxes, and ships the final products?

Answer 7

golgi apparatus

Question 8

which type of cellular transport does not require an input of energy?

Answer 8

facilitated diffusion

Question 9

if you want to see a three-dimensional image of DNA from a live specimen, which typeof microscope would you use?

Answer 9

scanning tunneling microscope

Question 10

which cell organelles are directly involved with the production of proteins?

Answer 10

ribosomes, endoplasmic reticulum, nucleus

Question 11

all cell, whether eukaryotic or prokaryotic, have a plasma membrane (true/false)

Answer 11

true

Question 12

what features of eukaryotic cells have enabled them to develop more specific functions than prokaryotic cells?

Answer 12

organelles

Question 13

which component of the plasma membrane contributes to the fluidity of the plasma membrane?

Answer 13

cholesterol molecules

Question 14

in prokaryotic cells, where does the conversion of fuel particles into usable energy occur?

Answer 14

cytoplasm

Question 15

in which structure is light energy captured and converted to chemical energy?

Answer 15

chloroplast

Question 16

how does osmosis occur between the two solutions seperated by the selectivity permeable membrane?

Answer 16

water moves to the right

Question 17

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 substances

Answer 17

diffusion

Question 18

which diagram shows a cell in a hypertonic solution?

Answer 18

less water in more water out

Question 19

muscle cells require a great amount of energy. which would you expect to find in large numbers in muscle cells?

Answer 19

mitochondria