Quiz #2 - Lab

Question 1

ribosomes

Answer 1

micro-machine for making proteins, protein synthesis site

Question 2

mitochondria

Answer 2

main site of ATP synthesis

Question 3

plasma membrane

Answer 3

forms the external boundary of the cell

Question 4

rough ER

Answer 4

studded with ribosomes
involved with the production, folding, quality control and despatch of some proteins
proteins are bound in vesicles for transport to the Golgi apparatus and other sites

Question 5

smooth ER

Answer 5

site of lipid synthesis

Question 6

Golgi apparatus

Answer 6

packages proteins for transportation

Question 7

peroxisomes

Answer 7

enzymes detoxify a number of toxic substances, the most important enzyme, catalase, breaks down hydrogen peroxide

Question 8

lysosomes

Answer 8

sac of digestive enzymes

Question 9

microtubules

Answer 9

support the cell and give it shape
involved in intracellular and cellular movements
form centrioles and cilia and flagella, if present

Question 10

intermediate filaments

Answer 10

resist mechanical forces acting on the cell

Question 11

microfilaments

Answer 11

involved in muscle contractions and other types of intracellular movement
help form the cells cytoskeleton

Question 12

centrioles

Answer 12

forms basal bodies and helps direct mitotic spindle formation

Question 13

cilia

Answer 13

coordinated movement creates a unidirectional current that propels substances across cell surfaces

Question 14

flagellum

Answer 14

propels the cell

Question 15

microvilli

Answer 15

increase surface area for absorption

Question 16

nucleus

Answer 16

encloses the chromatin

Question 17

cytoskeleton

Answer 17

internal cellular network of rodlike structures

Question 18

nuclear envelope

Answer 18

separates the nucleoplasm from the cytoplasm and regulates passage of substances to and from the nucleus

Question 19

nucleolus

Answer 19

packaging sit for ribosomes

Question 20

chromatin

Answer 20

DNA makes up the genes

Question 21

prophase

Answer 21

chromosomes condense
the nuclear membrane disintegrates

Question 22

metaphase

Answer 22

spindle fibers attach to centromeres
chromosomes align along metaphase plate (middle)

Question 23

anaphase

Answer 23

sister chromatids, each now called a chromosome, separate and move to opposite poles

Question 24

telophase

Answer 24

chromosomes arrive at each pole, and new nuclear membranes form
cytoplasmic division begins

Question 25

cytokinesis

Answer 25

cell division complete each cell received chromosomes that are identical to those in the original nucleus before DNA replication during interphase