GBIO 225 week 1 Exam

GBIO 225 week 1 Exam

1) The ability to maintain a constant internal environment is

• 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

• Cells.
• Atoms.
• Molecules.
• Organs.

4) Nucleic acids are built from

• DNA
• coenzymes
• nucleotides
• ATP

5) The two types of nucleic acids are

• RNA and proteins.
• DNA and RNA.
• nucleotides and DNA
• DNA and proteins.

6) Every living organism must have

• a nucleoid region.
• mitochondria.
• at least one cell.
• a cell wall.

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

• 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?

• 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

• before the nucleus.
• having many nuclei.
• having a nucleus with no DNA.
• having a membrane-bound nucleus.

10) The word eukaryotic means

• having no nucleus.
• before the nucleus
• having a true nucleus.
• having two nuclei.

11) Most of the molecules in cell membranes are

• nucleic acids.
• carbohydrates.
• phospholipids.
• proteins.

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

• 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.

• lysosomes
• mitochondria
• Golgi bodies
• ribosomes

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

• ribosomes
• Golgi bodies
• lysosomes
• mitochondria

15) These organelles contain enzymes that digest various substances.

• nuclei
• ribosomes
• Golgi bodies
• lysosomes

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

• Golgi body
• nucleus
• ribosomes
• mitochondria

17) The proteins of the cell membrane can function as

• 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

• proteins.
• lipids and proteins.
• lipids.
• electrolytes.
• &nbs
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19) Chromatin describes

• DNA and RNA.
• only DNA.
• DNA and associated proteins.
• RNA only.

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

• the spleen.
• the liver.
• the pancreas.
• skeletal muscles.

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

• 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

• supportive connective.
• fibrous.
• epithelial.
• loose connective.

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

• lymphoid
• loose connective
• epithelial
• nervous

24) Collagen fibers are found in high concentrations in which tissue? GBIO 225 week 1 Exam

• epithelial
• nervous
• muscle
• connective

25) Muscle that is NOT striped and is involuntary is

• skeletal.
• striated.
• cardiac.
• smooth.

26)The endocrine system functions in,    GBIO 225 week 1 Exam

• 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?

• urinary
• digestive
• immune
• integumentary

28)When a cell undergoes mitosis,

• 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?

• 16
• 32
• 64
• 8

30) The chromosome number in human body cells is

• 46
• 23
• 69
• 39