GBIO 225 week 1 Exam

GBIO 225 week 1 Exam

1) The ability to maintain a constant internal environment is

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physiology

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homeostasis

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development

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metabolism

2) Impulses are received by nerve cells through

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any process that is long enough to reach the receptor.

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an axon.

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the intervention of the neuroglia.

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numerous dendrites.

3) Tissues come together to form

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Cells.

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Atoms.

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Molecules.

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Organs.

4) Nucleic acids are built from

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DNA

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coenzymes

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nucleotides

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ATP

5) The two types of nucleic acids are

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RNA and proteins.

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DNA and RNA.

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nucleotides and DNA

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DNA and proteins.

6) Every living organism must have

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a nucleoid region.

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mitochondria.

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at least one cell.

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a cell wall.

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

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All cells divide by meiosis.

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Cells arise through spontaneous generation.

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All cells have a nucleus.

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

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

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cytoplasm, a cell wall, and lysosomes

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a nucleus, ribosomes, and a cell membrane

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a nucleus, cytoplasm, and a cell wall

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a plasma membrane, DNA, and cytoplasm

9) The word prokaryotic means

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before the nucleus.

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having many nuclei.

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having a nucleus with no DNA.

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having a membrane-bound nucleus.

10) The word eukaryotic means

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having no nucleus.

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before the nucleus.

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having a true nucleus.

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having two nuclei.

11) Most of the molecules in cell membranes are

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nucleic acids.

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carbohydrates.

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phospholipids.

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proteins.

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

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mitochondria

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ribosomes

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lysosomes

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Golgi bodies

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

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lysosomes

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mitochondria

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Golgi bodies

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ribosomes

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

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ribosomes

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Golgi bodies

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lysosomes

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mitochondria

15) These organelles contain enzymes that digest various substances.

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nuclei

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ribosomes

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Golgi bodies

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lysosomes

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

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Golgi body

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nucleus

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ribosomes

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mitochondria

17) The proteins of the cell membrane can function as

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enzymes.

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channels through the membrane.

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transporters that move substances across the membrane.

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all of these.

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

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proteins.

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lipids and proteins.

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lipids.

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electrolytes.

19) Chromatin describes

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DNA and RNA.

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only DNA.

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DNA and associated proteins.

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RNA only.

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

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the spleen.

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the liver.

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the pancreas.

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skeletal muscles.

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

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mitochondria have their own DNA.

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they both have cristae membranes.

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both are surrounded by a cell wall.

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the shapes and sizes are exactly the same.

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

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supportive connective.

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fibrous.

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epithelial.

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loose connective.

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

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lymphoid

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loose connective

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epithelial

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nervous

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

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epithelial

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nervous

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muscle

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connective

25) Muscle that is NOT striped and is involuntary is

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skeletal.

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striated.

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cardiac.

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smooth.

26)The endocrine system functions in

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hormonal control of body functioning.

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conduction.

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contraction.

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protection against disease.

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

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urinary

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digestive

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immune

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integumentary

28)When a cell undergoes mitosis,

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

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

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

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the daughter cells have identical genes.

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

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16

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32

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64

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8

30) The chromosome number in human body cells is

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46

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23

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69

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39