QUESTION 27What is a characteristic of the cell walls of mature plant cells?O a. LigninO b.CelluloseO c. PectinO d. A gluey matrix containing rope-like strandsO e. Glue-like polysaccharides

Plant cell contains cell wall and chloroplast organelle. But the animal cells don't have cell wall…

Answered: QUESTION 27 What is a characteristic of…

Biology 2e

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ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter8: Photosynthesis

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Problem 32CTQ: Imagine a sealed terrarium containing a plant and a beetle. How does each organism provide resources...

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QUESTION 20 You are studying the effects of removing integrins from cells. Which of the following abilities is the cell most likely to lose? A The cells are going to lose their ability to make connections with the ECM. B The cells will lose their ability to secrete growth factors. C The cells are going to lose their ability to form cell-cell adhesions. D The cells are going to lose their ability to communicate with the cytoskeleton.
QUESTION 22 Livestock in the western United States often die after eating a local weed, such as Astragalus toanus. The chemical that the plant contains is also poisonous to plants. Explain how locoweed could be preventing self-poisoning.
QUESTION 12 What is most likely to occur in a cell when the levels of free GTP-bound tubulin subunits are very high in the cytoplasm? A The GTP cap on the end of the microtubules will shrink. B Microtubules will lengthen by adding tubulin subunits to their + ends. C The GTP-bound tubulin subunits will move into the nucleus. D Microtubules will undergo catastrophe and shorten. E Microtubules will lengthen by adding tubulin subunits to their - ends.
QUESTION 5 Which of the following is NOT true of intermediate filaments? A They provide mechanical strength to cells. B They are composed of 8 oppositely oriented tetramers that are assembled into a rope-like filament. C They have a non-polar orientation. D They are rigid and do not deform before breaking. E Keratins, neurofilaments, vimentin, and desmin are examples of intermediate filaments.
QUESTION 13 What is the mechanism by which microtubules can rapidly shrink, or undergo â catastrophe?â A At low levels of ATP, tubulin subunits are not added to the + end of the microtubule. B At low levels of GTP, beta-tubulin subunits at the + end of the microtubule hydrolyze GTP, undergo a conformational change, and destabilize the filament so that the filament starts to disassemble from the + end. C At low levels of GTP, tau proteins are phosphorylated and bind to the microtubule to destabilize the + end. D At high levels of GTP, tubulin subunits are more quickly added to the â end than to the + end of the microtubule, resulting in a shrinking + end of the microtubule. E At low levels of ATP, the microtubules rapidly disassemble since ADP-bound tubulin subunits are lost at both the + and â ends of the filament.
QUESTION 35 What event occurs to divide the sister cells in two during cytokinesis? A. Constriction of the cell body by the sliding of myosin filaments on actin filaments. B. Contraction of the cell body by the shortening of actin and myosin filaments. C. Contraction of the cell body by shortening of the microtubules. D. Dissolving of the cytoplasm at the center of the cell body followed by polymerization of new actin filaments.
QUESTION 17 You inject a large fluorescent dye with a molecular weight >10,000 Da into a cell that is connected to its neighbors via gap junctions. What do you predict will happen next to the neighboring cells? A The dye would move into all neighboring cells that have gap junctions through the gap junctions. B The dye would move into all of the neighboring cells through the gap junctions. C The dye would move into only a select few neighboring cells. D Nothing - the dye would stay in the cell it was injected into because it to too large to move through gap junctions. .
Question 10Generally, shade leaves are…1. thicker leaf blades.2. have multiple layers of palisade mesophyll.3. have a higher proportion of spongy mesophyll over palisade mesophyll.4. have reduced intercellular spaces in spongy mesophyll.5. characterized by much smaller epidermal cells than sun leaves.
QUESTION 46 One explanation for why polar regions are colder than equatorial regions is that ____. a. the earth is spinning slower and the precipitation is more intense at the poles b. sunlight is more intense at the poles c. the earth is spinning slower at the poles d. sunlight strikes the polar regions at an angle and spreads out over a much larger area e. the sun never reaches these areas because of the tilt of Earth on its axis
QUESTION 9 Which of the following is/are a motor protein(s) that can carry vesicles along microtubules? A Dynein B Kinesin C Myosin D Tau E A and B
QUESTION 14 Which of the following statements is FALSE? A Microtubules will rapidly disassemble in response to a drop in the ATP concentration. B G-actin monomers and alpha-tubulin/beta-tubulin dimers assemble into filaments in their ATP-bound and GTP-bound forms, respectively. C Microtubules are stabilized by microtubule-binding proteins, such as Tau. D Actin-binding proteins allow F-actin to assemble in cells in many different ways. E Hydrolysis of ATP and GTP changes the conformation of the monomers once they are incorporated into actin filaments and microtubules, respectively.
Question:- 2.In case of red algae why you grind the sample with water?

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QUESTION 27 What is a characteristic of the cell walls of mature plant cells? O a. Lignin O b. Cellulose O C. Pectin O d. A gluey matrix containing rope-like strands O e. Glue-like polysaccharides