chapter 3 BBA

Question 1

Which of the following organelles are directly involved in endocytosis and exocytosis?

Answer 1

plasma mebrane

Question 2

What is the role of tRNA during translation?

Answer 2

Carry amino acids to the mRNA for correct placement into the protein chain

Question 3

The sugar found in RNA is called deoxyiribose

Answer 3

False

Question 4

The process during which the nucleus of a cell is divided into two nuclei is ____

Answer 4

mitosis

Question 5

Cell lining of the lumen of the fallopian tube is involved in ciliary action to transport the egg from the ovary to the uterus. The cytoskeleton structure responsible for this movement is

Answer 5

Tubulin

Question 6

Homeostasis is a static condition that when disrupted leads to disease.

Answer 6

FALSE

Question 7

The DNA molecule is double stranded, and the RNA molecule is single stranded.

Answer 7

TRUE

Question 8

Diffusion is the movement of solute while osmosis is the movement of solvent. Check all of the following that effect the rate of diffusion.

Answer 8

Size, Distance, gradient, and tempurature

Question 9

The job of mRNA is to pick up amino acids and transport them to the ribosomes.

Answer 9

FALSE

Question 10

Cell structures made of individual microtubule fibers that are involved in moving chromosomes during cell division are called _____.

Answer 10

spindles

Question 11

The functions of the centrioles include____

Answer 11

organizing the mitotic spindle in cell division

Question 12

Which of the following is NOT a premise of cell theory? (All cells arise from other cells.)
(All living cells require water for survival.)
(All living things are only composed of cells.)

Answer 12

All living cells require water for survival.

Question 13

Endocytosis is the equivalent of which of the following?

Answer 13

A human eating food

Question 14

During which phase do chromosome first become visible?

Answer 14

prophase

Question 15

A cell with 10 chromosomes undergoes mitosis. How many daughter cells are created? ___ Each daughter cell has ___ chromosomes.

Answer 15

2, 10

Question 16

Microvilli of eukaryotic cells require a cytoskeleton composed of ______ to function properly.

Answer 16

Actin

Question 17

Sister chromatids are ____.

Answer 17

joined strands of duplicated genetic material

Question 18

The process of translation occurs at the ribosome.

Answer 18

TRUE

Question 19

Nucleus

Answer 19

Houses DNA and RNA.

Question 20

Nucleoli

Answer 20

Dense speherical bodies in the nucleus that are the synthesis site for ribosomal RNA.

Question 21

Microtubules

Answer 21

Hollow cytoskeletal elements that act as organizers for the cytoskeleton.

Question 22

Endoplasmic Reticulum

Answer 22

Plays a role in the synthesis of steroid-based hormones and proteins.

Question 23

Ribosomes

Answer 23

The actual site of protein synthesis.

Question 24

The period of cell division is called ______.

Answer 24

cytokinesis

Question 25

Transcription must occur before translation may occur.

Answer 25

TRUE

Question 26

Flagella and cilia of eukaryotic cells require a cytoskeleton composed of ______ to function properly.

Answer 26

Tubulin

Question 27

Which defines a codon?

Answer 27

the genetic code word of three bases on mRNA that specify one amino acid

Question 28

During osmosis:

Answer 28

Water moves from an area of low solute concentration towards a higher solute concentration