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

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

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