GBIO 225 WEEK 1 EXAM

1) The ability to maintain a constant internal environment is

(1pts)

physiology 

homeostasis 

development 

metabolism 

2) Impulses are received by nerve cells through

(1pts)

any process that is long enough to reach the receptor. 

an axon. 

the intervention of the neuroglia. 

numerous dendrites. 

3) Tissues come together to form

(1pts)

Cells. 

Atoms. 

Molecules. 

Organs. 

4) Nucleic acids are built from

(1pts)

DNA 

coenzymes 

nucleotides 

ATP 

5) The two types of nucleic acids are

(1pts)

RNA and proteins. 

DNA and RNA. 

nucleotides and DNA 

DNA and proteins. 

6) Every living organism must have

(1pts)

a nucleoid region. 

mitochondria. 

at least one cell. 

a cell wall. 

7) Which of the following is MOST accurate regarding cells?

(1pts)

All cells divide by meiosis. 

Cells arise through spontaneous generation. 

All cells have a nucleus. 

All living organisms are made up of one or more cells. 

8) Which three things do all living cells have in common?

(1pts)

cytoplasm, a cell wall, and lysosomes 

a nucleus, ribosomes, and a cell membrane 

a nucleus, cytoplasm, and a cell wall 

a plasma membrane, DNA, and cytoplasm 

9) The word prokaryotic means

(1pts)

before the nucleus. 

having many nuclei. 

having a nucleus with no DNA. 

having a membrane-bound nucleus. 

10) The word eukaryotic means

(1pts)

having no nucleus. 

before the nucleus. 

having a true nucleus. 

having two nuclei. 

11) Most of the molecules in cell membranes are

(1pts)

nucleic acids. 

carbohydrates. 

phospholipids. 

proteins. 

12) These are the primary cellular sites for the assembly of proteins.

(1pts)

mitochondria 

ribosomes 

lysosomes 

Golgi bodies 

13) Which organelle is the sorting and shipping center of proteins for export from the cell or insertion into the cell membrane.

(1pts)

lysosomes 

mitochondria 

Golgi bodies 

ribosomes 

14) These organelles are the powerhouse of the cell and have enzymes that generate ATP.

(1pts)

ribosomes 

Golgi bodies 

lysosomes 

mitochondria 

15) These organelles contain enzymes that digest various substances.

(1pts)

nuclei 

ribosomes 

Golgi bodies 

lysosomes 

16) What organelle/structure stores the DNA in the cell?

(1pts)

Golgi body 

nucleus 

ribosomes 

mitochondria 

17) The proteins of the cell membrane can function as

(1pts)

enzymes. 

channels through the membrane. 

transporters that move substances across the membrane. 

all of these. 

18) Selective permeability of the cell membrane is controlled by the plasma membrane which is composed of

(1pts)

proteins. 

lipids and proteins. 

lipids. 

electrolytes. 

19) Chromatin describes

(1pts)

DNA and RNA. 

only DNA. 

DNA and associated proteins. 

RNA only. 

20) The smooth endoplasmic reticulum stores and releases calcium ions in which organ?

(1pts)

the spleen. 

the liver. 

the pancreas. 

skeletal muscles. 

21) Scientists believe that mitochondria may have evolved from bacteria because

(1pts)

mitochondria have their own DNA. 

they both have cristae membranes. 

both are surrounded by a cell wall. 

the shapes and sizes are exactly the same. 

22) The tissue that lines internal surfaces of the body is

(1pts)

supportive connective. 

fibrous. 

epithelial. 

loose connective. 

23) Tears, milk, sweat, and oil are secreted by glands made of what tissue?

(1pts)

lymphoid 

loose connective 

epithelial 

nervous 

24) Collagen fibers are found in high concentrations in which tissue?

(1pts)

epithelial 

nervous 

muscle 

connective 

25) Muscle that is NOT striped and is involuntary is

(1pts)

skeletal. 

striated. 

cardiac. 

smooth. 

26)The endocrine system functions in

(1pts)

hormonal control of body functioning. 

conduction. 

contraction. 

protection against disease. 

27)The maintenance of the volume and composition of body fluids is the direct responsibility of which system?

(1pts)

urinary 

digestive 

immune 

integumentary 

28)When a cell undergoes mitosis,

(1pts)

the daughter cells have identical genes, and these genes are identical to those of the "parent" cells that produced them.

the amount of cytoplasm in the "parent" cell and in each daughter cell is equal. 

there is an exact duplication and division of all of the organelles between daughter cells. 

the daughter cells have identical genes. 

29) In mitosis, if a "parent" cell has 16 chromosomes, each daughter cell will have how many chromosomes?

(1pts)

16 

32 

64 

30) The chromosome number in human body cells is

(1pts)

46 

23 

69 

39

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    ** *** ******* ** ******** a ******** ******** *********** ***

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    physiology

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    mitochondria

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    23

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