Florida International University PCB 2010 Exam 1. Contains 40 Questions With Answers Highlighted.

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Why does the molecule shown make plaques along the walls of blood vessels? Select one: a. it is hydrophillic and can trap dust b. it is hydrophobic and would not dissolve in blood fluid c. it is h... ydrophobic and can repel insects d. it is hydrophillic and likes to stick to blood fluid e. it is hydrophobic and serves as a waterproof barrier it is hydrophobic and would not dissolve in blood fluid Question 2 Flag question Question text What kind of bond occurs between nucleotides in a DNA molecule, such as the polar "G" nucleotide on one strand with the polar "C" nucleotide on the other strand? Select one: a. hydrophobic interactions b. hydrogen bonds c. adhesive interactions d. covalent bonds e. ionic bonds hydrogen bonds Question 3 In Flag question Question text What level of biological organization typically includes the smallest amount of biological material? Select one: a. ecosystem b. organism c. community d. organ e. population organ Question 4 Flag question Question text Which of the following has a positive charge? Select one: a. proton b. electron c. atomic mass d. neutron e. isotope proton Question 5 In Flag question Question text Which organelle is physically connected to the nuclear envelope? Select one: a. Golgi apparatus b. mitochondria c. endoplasmic reticulum d. nucleolus e. lysosome endoplasmic reticulum Question 6 Flag question Question text Which of the following molecules could be used for an immediate source of energy? Select one: a. nucleic acids b. carbohydrates c. water d. protein e. lipids carbohydrates Question 7 Flag question Question text What cellular activity can be assessed using pulse-label experiments? Select one: a. breakdown of worn-out cell parts b. cell division c. cell movement d. rebuilding of the cytoskeleton e. secretion secretion Question 8 Flag question Question text What kind of interaction occurs between atoms of sodium and chlorine? Select one: a. The sodium atom gives up one proton b. The sodium atom gives up one neutron c. The chlorine atom gives up one neutron d. The chlorine atom gives up one electron e. The sodium atom gives up one electron The sodium atom gives up one electron Question 9 Flag question Question text What is true of humans? Select one: a. they are classified as protists b. they are descended from apes c. they belong to the domain Archaea d. they share a common ancestor with apes e. they are prokaryotes they share a common ancestor with apes Question 10 In Flag question Question text What type of bond occurs when electrons are equally shared between two atoms? Select one: a. polar b. hydrogen c. ionic d. nonpolar e. adhesive nonpolar Question 11 Flag question Question text What would be the result of a cell that did not have RNA molecules? Select one: a. The DNA would take over its job b. The cell would not have genes c. There would be no effect on the cell d. The cell could not make energy e. The cell would not be able to make proteins The cell would not be able to make proteins Question 12 In Flag question Question text Which of the following proteins is not ly matched with its function? Select one: a. hemoglobin: transport oxygen b. myosin: movement of muscles c. antibodies: fight bacteria and foreign materials d. growth hormone: regulate sugar levels in blood e. keratin: structure and support growth hormone: regulate sugar levels in blood Question 13 Flag question Question text What is true of a protein that has been denatured by high heat? Select one: a. It can be reformed by cooling it back to room temperature b. It will still work the same as before the denaturation process c. It will no longer be able to perform its normal function d. It can be reformed by changing the pH e. It can be reformed by further heating It will no longer be able to perform its normal function Question 14 In Flag question Question text What is true regarding the diagram above? Select one: a. two oxygen atoms interact to form one covalent bond b. two oxygen atoms interact to form two covalent bonds c. two oxygen atoms interact to form four covalent bonds d. two oxygen atoms interact to form an ionic bond e. two oxygen atoms interact to form hydrogen bonds two oxygen atoms interact to form two covalent bonds Question 15 Flag question Question text Cyanide directly affects mitochondria. What cell process does cyanide specifically harm? Select one: a. production of ATP molecules b. secretion of proteins to outside c. creation of new cells d. production of new cell proteins e. transport of carbohydrates production of ATP molecules Question 16 Flag question Question text Which of the following is the largest number describing an atom? Select one: a. Electron number b. Neutron number c. Atomic number d. Proton number e. Mass number Mass number Question 17 Flag question Question text Water molecules disassociate _ (blank) _ in salt crystals when they are dissolved in water. Select one: a. nonpolar covalent bonds b. hydrogen bonds c. polar covalent bonds d. ionic bonds e. hydrophobic interactions ionic bonds Question 18 In Flag question Question text All of the following are likely to be a function of proteins in living organisms except _(blank) _. Select one: a. defense b. support c. metabolism d. transport e. long term energy storage long term energy storage Question 19 Flag question Question text Which of the following cells would have a nucleus, a cell wall, and a large central vacuole? Select one: a. archaean cell b. animal cell c. bacterial cell d. plant cell e. prokaryotic cell plant cell Question 20 In Flag question Question text Where are lipids synthesized outside of the endomembrane system? Select one: a. smooth endoplasmic reticulum b. rough endoplasmic reticulum c. Golgi apparatus d. nucleus e. mitochondria mitochondria Question 21 Flag question Question text Using the animal cell diagram, identify the cell structure marked "e." Select one: a. lysosome b. mitochondrion c. nucleus d. centrioles e. nucleolus centrioles Question 22 Flag question Question text Which cell organelle is responsible for processing, packaging, and the secretion of proteins? Select one: a. Golgi apparatus b. nucleus c. lysosomes d. smooth endoplasmic reticulum e. rough endoplasmic reticulum Golgi apparatus Question 23 Flag question Question text What characteristic of human intestinal cells increases the surface-area-tovolume ratio and allows increased absorption of materials? Select one: a. very few organelles inside cells b. larger cell size c. many cilia d. many flagella e. surface folds called microvilli surface folds called microvilli Question 24 Flag question Question text Which of these functional groups would be related to nucleotides and phospholipids? Select one: a. hydroxyl b. phosphate c. sulfhydryl d. carbonyl e. carboxyl phosphate Question 25 In Flag question Question text Which of the following can be used to identify an atom? Select one: a. number of electrons b. atomic charge c. atomic mass d. number of protons e. number of neutrons number of protons Question 26 In Flag question Question text What type of bond occurs between positively and negatively charged atoms? Select one: a. covalent bond b. adhesive interaction c. hydrogen bond d. ionic bond e. hydrophobic interaction ionic bond Question 27 Flag question Question text Using the animal cell diagram, identify the cell structure marked "b." Select one: a. nucleus b. Golgi apparatus c. smooth endoplasmic reticulum d. mitochondria e. rough endoplasmic reticulum mitochondria Question 28 In Flag question Question text How does the ratio of surface area to volume change in a cell as its size increases? Select one: a. the volume stays the same but the surface area increases b. the volume and surface area increase in equal amounts c. the surface area stays the same but the volume increases d. the volume increases more than the surface area e. the surface area increases more than the volume the volume increases more than the surface area Question 29 Flag question Question text Using the plant cell diagram, identify the cell structure marked "a." Select one: a. cytoplasm b. nucleus c. mitochondria d. central vacuole e. Chloroplast central vacuole Question 30 In Flag question Question text What type of bond occurs when electrons are shared? Select one: a. isotope b. metallic c. covalent d. ionic e. octet covalent Question 31 Flag question Question text If water is mixed with salt in a beaker, what does the salt represent? Select one: a. the solvent b. the solute c. the solution d. the buffer e. the ion the solute Question 32 In Flag question Question text Members of the same species located within a particular area are called _ (blank) _. Select one: a. a community b. an ecosystem c. a population d. an organism e. a biosphere a population Question 33 Flag question Question text What kingdom is characterized by eukaryotic, multicellular organisms that ingest their food? Select one: a. Fungi b. Plants c. Protists d. Animals e. Archaea Animals Question 34 In Flag question Question text The more unsaturated a lipid is, _ (blank) _. Select one: a. the more glycerol it contains b. the more liquid it is at room temperature c. the more solid it is at room temperature d. the more hydrogen it contains e. the fewer kinks it has the more liquid it is at room temperature Question 35 In Flag question Question text Why is hydrochloric acid classified as an acid? Select one: a. it absorbs excess hydroxide ions from the solution b. it dissociates to release hydroxide ions c. it dissociates to release hydrogen ions and absorbs excess hydroxide ions from the solution d. it absorbs excess hydrogen ions from the solution e. it dissociates to release hydrogen ions it dissociates to release hydrogen ions and absorbs excess hydroxide ions from the solution Question 36 In Flag question Question text Which of the following would be explainable due to something other than the descent of living things from one common ancestor? Select one: a. Life is organized. b. Life is photosynthetic. c. Life is homeostatic. d. Life forms ecosystems. e. Life evolves. Life is photosynthetic. Question 37 Flag question Question text What is the basic unit of structure and function for all life? Select one: a. atom b. molecule c. cell d. organ e. organism cell Question 38 Flag question Question text Which structure can occupy up to 90% of the volume in a plant cell? Select one: a. central vacuole b. endoplasmic reticulum c. nucleus d. chloroplasts e. cytoplasm central vacuole Question 39 Flag question Question text Where are the majority of ribosomes found inside the cell? Select one: a. cytoskeleton b. nuclear envelope c. smooth endoplasmic reticulum d. rough endoplasmic reticulum e. mitochondria rough endoplasmic reticulum Question 40 Flag question Question text Using the animal cell diagram, identify the function of the cell structure marked "a." Select one: a. to provide structural support and shape b. to make energy molecules c. to break down old organelles d. to carry genetic information e. to produce and modify new proteins to produce and modify new proteins [Show More]

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