Biology 1320 Exam Two Fall 2012

100 Questions | Attempts: 83
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  • 1/100 Questions

    Hooke was the first to observe cells under a simple microscope in the 1600s because he was looking at:

    • Plant cells in which the thick cell wall was clearly visible and reminded him of prison cells
    • Flagellated eukaryotic cells that were moving
    • Flagellated bacterial cells that were moving
    • Egg cells, which can be extraordinarily large
    • Cells that were naturally colored
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Biology 1320 Exam Two Fall 2012 - Quiz

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  • 2. 

    The RNA in the nucleus leaves through 

    • Frets

    • Ribosomes

    • Vessicles

    • Nuclear pores

    • Thylakoids

    Correct Answer
    A. Nuclear pores
  • 3. 

    The system of canals, tubes, and sacs that transports molecules inside the cytoplasm is the:

    • Golgi bodies

    • Ribosomes

    • Vesicles

    • Lysosomes

    • Endoplasmic reticulum

    Correct Answer
    A. Endoplasmic reticulum
  • 4. 

    Lysosomes contain _____ enzymes.

    • Synthesis

    • Digestive

    • Photosynthetic

    • Growth

    • Respiration

    Correct Answer
    A. Digestive
  • 5. 

    The stacks of coin-shaped (mint-like) double membranes found in chloroplasts are

    • Frets

    • Plasma membranes

    • Vacuolar membranes

    • Golgi bodies

    • Grana

    Correct Answer
    A. Grana
  • 6. 

    Proteins consist of: 

    • Glycerol and fatty acids linked together

    • Amino acids linked together

    • Phosphates and glycerol

    • Lipids and membranes

    • Carbon, hydrogen, and oxygen

    Correct Answer
    A. Amino acids linked together
  • 7. 

    In reference to diffusion, "passive" really means:

    • No ATP energy is required

    • No gradient

    • Very slowly

    • In the air

    • Without a membrane

    Correct Answer
    A. No ATP energy is required
  • 8. 

    Four of the five structures listed below are composed of membranes. Select the exception.

    • Chromosome

    • Endoplasmic reticulum

    • Granum

    • Nuclear envelope

    • Plasma membrane

    Correct Answer
    A. Chromosome
  • 9. 

    What are cilia?

    • Short, eyelash-like projections from the cell membrane that provide for locomotion

    • Globs of RNA

    • Central vauoles

    • Bundles of chloroplats

    • Long whip-like projections from the cell membrane that provide for locomotion

    Correct Answer
    A. Short, eyelash-like projections from the cell membrane that provide for locomotion
  • 10. 

    The DNA molecules is usually made up of how many strands?

    • 12

    • 1

    • 2

    • 3

    • 6

    Correct Answer
    A. 2
  • 11. 

    Microfilaments and microtubules

    • Are sites of repiration

    • Contain digestive enzymes

    • Are sites of protein synthesis

    • Function in cell structure and movement

    • Are sites of photosynthesis

    Correct Answer
    A. Function in cell structure and movement
  • 12. 

    Which of the following are sometimes referred to as rough or smooth depending on surface structure?

    • Endoplasmic reticula

    • Nuclear envelope

    • Lysosomes

    • Plasma membrane

    • Golgi bodies

    Correct Answer
    A. Endoplasmic reticula
  • 13. 

    Organelle that transfers energy from organic compounds (sugar) to ATP:

    • Ribosomes

    • Mitochondria

    • Nucleus

    • E.R.

    • Lysosome

    Correct Answer
    A. Mitochondria
  • 14. 

    Sodium ions cross a membrane through transport proteins that receive an energy boost to move against the concentration gradient. This is an example of ___________.

    • A & C

    • Passive transport

    • Facilitated diffusiton

    • Active transport

    • Microtubules

    Correct Answer
    A. Active transport
  • 15. 

    If a lipid has fatty acids and a phosphate group attached to a glycerol molecule, it is called a 

    • Fat

    • Protein

    • Cell membrane

    • Phospholipid

    • Wax

    Correct Answer
    A. Phospholipid
  • 16. 

    The basic unit of the life is the:

    • Organ

    • Atom

    • Molecule

    • Cell

    • Tissue

    Correct Answer
    A. Cell
  • 17. 

    Not all substances can cross the cell membrane, for this reason, the cell membrane is said to be

    • A capsule

    • A barrier

    • Selectively permeable

    • Membrane bound

    • A cell wall

    Correct Answer
    A. Selectively permeable
  • 18. 

    In general, the net movement of molecules in a fluid is a response to the 

    • Electrical gradient

    • Energy gradient

    • Heat gradient

    • Concentration gradient

    • Pressure gradient

    Correct Answer
    A. Concentration gradient
  • 19. 

    A white blood cell engulfing a bacterium is an example of _____.

    • Receptor-mediated endocytosis

    • Exocytosis

    • Pinocytosis

    • Facilitated diffusion

    • Phagocytosis

    Correct Answer
    A. Phagocytosis
  • 20. 

    Which one of the following organelles resembles a bacterium in its size and biochemistry?

    • A lyzosome

    • The nucleolus

    • The endoplasmic reticulum

    • A golgi body

    • A mitochondrion

    Correct Answer
    A. A mitochondrion
  • 21. 

    Which organelle below is capable of producing its own protein since it has its own ribosomes? 

    • Dictyosome

    • Lysosome

    • Chloroplast

    • Microtubule

    • None of the above

    Correct Answer
    A. Chloroplast
  • 22. 

    A phospholipid has a phosphate-containing head and two fatty acid tails attached to a backbone of 

    • Nucleic acid

    • Glycerol

    • Glycogen

    • Guanine

    • Glucose

    Correct Answer
    A. Glycerol
  • 23. 

    A peptide bond joins: 

    • The amine group of one amino acid and the peptide group of another

    • The carboxyl groups of two amino acids.

    • The amino group of one amino acid and the carboxyl group of another.

    • Glucose to fructose.

    • The amino groups of two amino acids.

    Correct Answer
    A. The amino group of one amino acid and the carboxyl group of another.
  • 24. 

    What is a characteristic of all life on earth?

    • Cells must take in raw materials

    • Cells must take in energy

    • Cells must build biological molecules

    • The cellular interior must be isolated from the environment

    • All of the above

    Correct Answer
    A. All of the above
  • 25. 

    Plasma membranes incorporate ______.

    • Receptor proteins

    • Transport proteins

    • Recognition proteins

    • Adhesion proteins

    • All of the above

    Correct Answer
    A. All of the above
  • 26. 

    The Golgi apparatus packages materials into _____ for transport or export.

    • Organelles

    • Plastids

    • Nucleoli

    • Micelles

    • Vesicles

    Correct Answer
    A. Vesicles
  • 27. 

    The capacity of a cell to exhibit movement or mobility is generally attributed to which cellular component?

    • Microtubules

    • Nucleus

    • Chromosomes

    • Vacuoles

    • Microbodies

    Correct Answer
    A. Microtubules
  • 28. 

    The fluid behavior of the plasma membrane as we saw in the class video clip results primarily from the ______. (Remember the movie clip of a pin poking the cell membrane). 

    • Temperature gradients across the membrane

    • Distribution of membrane proteins

    • Ability of membrane proteins to change shape

    • PH factor of the membrane

    • Flexibility of the lipid components

    Correct Answer
    A. Flexibility of the lipid components
  • 29. 

    If lysosomes bursts inside a cell, the immediate result is likely to be:

    • The cell will be unable to export its products

    • It will be repaired with no loss of function

    • The cell will be digested from within

    • DNA will be released into the cytoplasm

    • The cell will be unable to build proteins

    Correct Answer
    A. The cell will be digested from within
  • 30. 

    The cell wall: 

    • Prevents the transport of toxic substances into the plant cells

    • Provides physical support for plant cells

    • Controls the transport of materials out of the cell

    • Replaces the plasma membrane in plant cells

    • Is found in all eukaryotes

    Correct Answer
    A. Provides physical support for plant cells
  • 31. 

    Which one of the following pairs is obviously mismatched?

    • Ribosomes ---> site of protein synthesis

    • Flagella ---> 9+2 microtubules

    • Lysosome ---> stores digestive enzymes

    • Chloroplast ---> production of sugar

    • Golgi bodies ---> production of energy

    Correct Answer
    A. Golgi bodies ---> production of energy
  • 32. 

    Which is the correct sequence of polypeptide transport in the secretory (releasing secretions) pathway?

    • Golgi bodies>>>ribosomes>>>ER>>>plasma membrane

    • Plasma membrane>>>Golgi bodies>>>ER>>>ribosomes

    • Plasma membrane>>>ER>>>Golgi bodies>>>ribosomes

    • Ribosomes>>>Golgi bodies>>>ER>>>plasma membrane

    • Ribosomes>>>ER>>>Golgi bodies>>>plasma membrane

    Correct Answer
    A. Ribosomes>>>ER>>>Golgi bodies>>>plasma membrane
  • 33. 

    Organelles involved in the synthesis of steroids and other lipids in gland cells are 

    • Mitochondria

    • Rough E.R.

    • Smoothe E.R.

    • Dictyosome

    • Soft E.R.

    Correct Answer
    A. Smoothe E.R.
  • 34. 

    The part of the cell that regulates movement of substances into and out of the cell is the 

    • Nuclei

    • Nucleus

    • Cell membrane

    • Golgi apparatus

    • Mitochondrion

    Correct Answer
    A. Cell membrane
  • 35. 

    The "tertiary" level of protein structure refers to the: 

    • The third amino acid in the sequence

    • Amino acid sequence in the polypeptide

    • The coiling of the polypeptide

    • Joining of two or more polypeptides together

    • The twisting of the coil into a knot or glob

    Correct Answer
    A. The twisting of the coil into a knot or glob
  • 36. 

    Cells with high energy requirements, such as muscle (as in a humming bird), tend to have many

    • Chloroplases

    • Nucleoli

    • Mitochondria

    • Junction

    • Lysosomes

    Correct Answer
    A. Mitochondria
  • 37. 

    The fluid filled sac that may store food, acids, vitamins, ions, or water in plant cells and is involved in flui (? I can't read it lol)

    • Nucleolus

    • Plastid

    • Central vacuole

    • ER

    • Dictyosome

    Correct Answer
    A. Central vacuole
  • 38. 

    When a protein permanently loses its characteristic three-dimensional structure, it is said to be:

    • Denatured

    • Demolished

    • Broken

    • Undone

    • Decomposed

    Correct Answer
    A. Denatured
  • 39. 

    The principle structural carbohydrate in plant cell walls are:

    • Mannose

    • Glycogen

    • Cellulose

    • Sorbitol

    • Starch

    Correct Answer
    A. Cellulose
  • 40. 

    A prokaryote has

    • Mitochondria

    • A nucleus

    • A cell membrane

    • Membrane bound organelles

    • All of the above

    Correct Answer
    A. A cell membrane
  • 41. 

    Proteins function in the cell for:

    • Energy storage

    • Structure

    • Enzymes

    • Genetic storage

    • Energy storage, structure, and enzymes

    Correct Answer
    A. Energy storage, structure, and enzymes
  • 42. 

    Which of the following consists of a nonliving substance?

    • Chromosome

    • Plasma membrane

    • Mitochondrion

    • Endoplasmic reticulum

    • Cell wall

    Correct Answer
    A. Cell wall
  • 43. 

    All cell membranes and organelle membranes consist of two phospholipid layers called a 

    • Vessicles

    • Smooth ER

    • Lipid bilayer

    • Cell wall

    • Capsule

    Correct Answer
    A. Lipid bilayer
  • 44. 

    Most membrane functions are carried out by _________.

    • Nucleic acids

    • Proteins

    • Hormones

    • Ribosomes

    • Phospholipids

    Correct Answer
    A. Proteins
  • 45. 

    Which is the organelle with cristate? 

    • Endoplasmic reticulum

    • Mitochondria

    • Microbody

    • Ribosome

    • Nucleus

    Correct Answer
    A. Mitochondria
  • 46. 

    What are flagella?

    • Globs of RNA

    • Long whip-like projections

    • Bundles of chloroplats

    • Short, hair-like projections

    • Central vauoles

    Correct Answer
    A. Long whip-like projections
  • 47. 

    You received all of your mitochondria from 

    • Dad

    • Plants

    • Fish

    • Mom

    • Protozoans

    Correct Answer
    A. Mom
  • 48. 

    Probably the most important cross-linkage determining the tertiary structure of many proteins is the: 

    • Disulfide bridge

    • Hydrogen bond

    • Ester

    • Peptide bond

    • None of the above

    Correct Answer
    A. Disulfide bridge
  • 49. 

    What is a role of proteins found in eukaryotic plasma membranes:

    • Copying DNA

    • Regulating the flow of materials through the membrane

    • Building proteins

    • Immune system action

    • All of the above

    Correct Answer
    A. Regulating the flow of materials through the membrane

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