CELL STRUCTURES

Question 1

•Is the outer covering that surrounds each cell. This separates cell contents from the surrounding environment. Its main structural building blocks are phospholipids (fats) and globular protein molecules.

Answer 1

PLASMA MEMBRANE

Question 2

•Is the center of activity of each cell or the control center of the cell, and its
destruction will cause death of the whole cell

Answer 2

NUCLEUS

Question 3

•Is composed of a semi-liquid substance containing many minute fibrils, linins
and granules called

Answer 3

CHROMATIN

Question 4

•It is the major site of most activities carried out by the cell.

Answer 4

CYTOPLASM

Question 5

•Are densely staining roughly spherical bodies composed of Ribonucleic acid (RNA) and protein. They are the actual sites of protein synthesis.

Answer 5

RIBOSOMES

Question 6

•Is a highly folded system of membranous tubules and cisterns (sacs) that extends throughout the cytoplasm.

Answer 6

ENDOPLASMIC RETICULUM

Question 7

•Is a stack of flattened sacs with bulbous ends and associated membranous vesicles that is generally found close to the nucleus.

Answer 7

GOLGI APPARATUS

Question 8

•Which appear in various sizes, are membrane bound sacs containing
an array of powerful digestive enzymes.

Answer 8

LYSOSOMES

Question 9

•Like lysosomes, are enzyme-containing sacs. Particularly
abundant in kidney and liver cells, cells that are actively involved in detoxification.

Answer 9

PEROXISOMES

Question 10

•Rod-shaped bodies with a double-membrane wall

Answer 10

MITOCHONDRIA

Question 11

•They are rod-shaped bodies that lie at right
angles to each other.

Answer 11

CENTRIOLES

Question 12

•Small granule in the cytoplasm lying close to the nucleus and is
concerned with cell division.

Answer 12

CENTROSOME

Question 13

•Are fibers spreading out from the cytoplasm like branches of a tree.

Answer 13

PROCESSES

Question 14

•Is that part of the cell membrane that includes the nucleus and the surrounding cytoplasm

Answer 14

CELL BODY

Question 15

•Cell division in all cells other than bacteria consists of two events called

Answer 15

MITOSIS AND CYTOKINESIS

Question 16

•Is the division of the copied DNA of the mother
cell to two daughter cells

Answer 16

MITOSIS

Question 17

•Is the division of the cytoplasm, which begins when mitosis is nearly complete.

Answer 17

CYTOKINESIS

Question 18

•Is the first phase of mitosis.

Answer 18

PROPHASE

Question 19

•Each duplicated chromosomes consists of two
identical threads, called

Answer 19

SISTER CHROMATIDS

Question 20

•Is the second phase of mitosis wherein the two centrosomes are at opposite poles of the cell.

Answer 20

METAPHASE

Question 21

•Is the third phase and the shortest phase of mitosis that begins abruptly as the centromeres of the centrosomes split simultaneously.

Answer 21

ANAPHASE

Question 22

•Is the final phase of mitosis that begins as soon as chromosomal movement stops.

Answer 22

TELOPHASE

Question 23

•Begins during late anaphase and continues through and beyond telophase

Answer 23

CYTOKINESIS

Question 24

Which is composed primarily of proteins and Ribonucleic acid (RNA)

Answer 24

NUCLEOLI

Question 25

Are assembly sites for ribosomal particles that are particularly abundant in the cytoplasm.

Answer 25

NUCLEOLI

Question 26

Are the metabolic machinery of the cell, and they are highly organized to carry out specific functions for the cell as a whole.

Answer 26

ORGANELLES

Question 27

Are the metabolic machinery of the cell, and they are highly organized to carry out specific functions for the cell as a whole.

Answer 27

ORGANELLES

Question 28

Often referred to as the “suicide sacs” of the cell.

Answer 28

LYSOSOMES

Question 29

Ramify throughout the cytoplasm, forming an internal scaffolding

Answer 29

CYTOSKELETAL ELEMENTS