15) Which statement is true regarding cell wall polysaccharides A) Lignin is a (

Question

15) Which statement is true regarding cell wall polysaccharides A) Lignin is a (1->4)B-D-glucan chain with many side branches B) Pectin is a (1-94)B-D-glucan chain with no side branches C) Cellulose is a (1->4)B-D-glucan chain with many side branches D) Cellulose is a (1>4)B-D-glucan chain with no side branches E) Hemicellulose is a (194)?-D-glucan chain with no side branches 16) Which component of the primary cell wall contributes most to the cell's structural rigidity: A) cellulose B) hemicelluloses C) pectins D) lignin E) peptidoglycans Which component is usually only found in secondary cell walls: A) cellulose 17) B) hemicelluloses C) pectins D) lignin E) peptidoglycans 22) In a signal transduction cascade, the receptor is usually located A) In the nucleus A) In the nuclcus B) on the pa memane Aywhere the signal can reach D) In the cytoplasmE) On the leaf surface Which statement is most FALSE regarding signal transduction cascades in plants A) Signal transduction cascades interact with each other B) Signal transduction cascades can work over very short or very long distances C) Plant cascades are usually a series of positive activation steps D) Plant cascades usually involve the inactivation of a repressor E) The receptor for a hormone may be part of the ubiquitination process targeting a repressor for 23) degradation 24) The expression "one bad apple ruins the bunch" can be applied figuratively to a disruptive student in a lecture hall, but in literal, botanical terms, this expression refers to the action of A) Ethylene B) Auxin C) Cytokinin D) Gibberellic acid E) Abscisic acid

Explanation / Answer

15. Cellulose is a (1->4)beta-D glucan with many side chains.

16. Cellulose

17. Lignin

22. On the plasma membrane

23. Plant cascades are ususllya series of positive activation steps.

24. Ethylene

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