Cell Biology 1

Question 0

The structure of biological molecules can best be described as

Answer 0

A fluid-mosaic of proteins interspersed in a phospholipid bilayer

Question 1

Which of the following does not inhibit microtubular polymerization?

Answer 1

Taxol

Question 2

Simple, non-ciliated columnar epithelium is the most like the following

Answer 2

Digestive Tract

Question 3

Which of the following correctly describes the nucleolus?

Answer 3

It is the site for synthesis of rRNA

Question 4

During cell cycle, there are several check points that serve to ensure that everything is ready prior to proceeding to the next stage of the cell cycle. One of these checkpoints is the microtubule assembly check point; this specific checkpoint occurs during which of the following stages of the cell cycle?

Answer 4

M

Question 5

Nuclear lamins are intermediate filaments that

Answer 5

Line the inner aspect of the nuclear envelope

Question 6

A connexon is a structural component of the

Answer 6

Gap Junction

Question 7

True or False

Each microtubule consists of thirteen protofilaments

Answer 7

True

Question 8

Which of the following junctional complexes provides a tight seal between adjacent epithelial cells and serves as a barrier for paracellular transport

Answer 8

Zonula occludens

Question 9

Junctional complexes are associated with which cellular domains?

Answer 9

Basolateral

Question 10

Which of the following group of cell adhesion molecules is calcium independent and mainly involved in cell extracellular matrix interactions, binding both extracellular matrix and to the internal cytoskeleton?

Answer 10

Integrins

Question 11

Which of the following categories of membrane proteins is represented by proteins that have a hydrophobic domain and two hydrophilic domains?

Answer 11

Transmembrane proteins

Question 12

SNARE, SNAP and VAMP are associated with which of the following processes?

Answer 12

Vesicle and target membrane docking

Question 13

Which of the following groups of CAMs functions through carbohydrate binding?

Answer 13

Selectins

Question 14

True or False
Some cargos are stored in secretory vesicles within the cytoplasm and released in response to a specific extracellular signal such as a hormone. This type of secretory pathway is referred to as constitutive.

Answer 14

False

Question 15

Transport complexes that serve to transport proteins across the outer mitochondrial membrane into the intermembrane space, from which they may be further transported across the inner membrane and perhaps into the matrix, are referred to as

Answer 15

TOMs

Question 16

Transitional epithelium is associated with which of the following systems?

Answer 16

Urinary

Question 17

During which parts of the cell cycle do chromosomes consist of two chromatids each?

Answer 17

Late G2

Question 18

Which of the following promotes the formation of stable complexes between exportins and their cargo proteins?

Answer 18

Ran-GTP

Question 19

Linker DNA is associated with which histone?

Answer 19

H1

Question 20

In the cytoplasm, as part of the process for moving materials across the nuclear membrane, which of the following Ran-GTP to Ran-GDP

Answer 20

Ran-GAP

Question 21

Which of the following motor molecules consists of one head domain binding to actin and one tail domain binding to the cell membrane of a cargo vesicle?

Answer 21

Myosin 1

Question 22

Which of the following statements is true?

Answer 22

Coatamers are removed shortly before docking with their target membranes

Question 23

Which of the following is located within the membrane phospholipid bilayer and moderates membrane fluidity by restricting movement of phospholipid fatty acid side chains at high temperatures?

Answer 23

Cholesterol

Question 24

Which of the following motor molecules consists of one head domain binding to actin and one tail domain binding to the cell membrane of a cargo vesicle?

Answer 24

Myosin

Question 25

Which of the following forms caps and prevent elongation of actin filament?

Answer 25

Cytochalasin

Question 26

Which of the following is NOT a type of intermediate filament?

Answer 26

Fibronectin

Question 27

At which stage of mitosis are the chromosomes lined up on the equatorial plate of the cell?

Answer 27

Metaphase

Question 28

At which stage of mitosis do sister chromatids move to opposite poles?

Answer 28

Anaphase

Question 29

Synthesis of materials required for mitosis occurs during which stage of the cell cycle?

Answer 29

G1 Stage

Question 30

Which type of membrane transport molecules carries 2 molecules simultaneously in opposite directions?

Answer 30

Antiporter