In plants, primary and secondary cell walls, though distinctly different, share all of the following molecules except

a. cellulose.
b. hemicelluloses.
c. pectin.
d. peptidoglycans.


Ans: d. peptidoglycans.

Biology & Microbiology

You might also like to view...

Which of the following enzymes are NOT secreted by TH1 to activate macrophages?

A) granulocyte-monocyte colony stimulating factor B) interferon gamma C) TNF-? D) fibrin

Biology & Microbiology

A plate of solid growth medium with colonies on it is pressed gently onto sterile velveteen. The

velveteen "stamp" is used to make identical plates. This technique is called:

a. replication. b. replica plating. c. plating. d. plate making. e. horizontal gene transfer

Biology & Microbiology

Today the term "algae" is used primarily for

organisms in the group(s) a. bacteria. b. protista. c. plantae. d. bacteria and protista only. e. bacteria, protista, and plantae

Biology & Microbiology

The traditional evolutionary diagrams are in the form

of a. interlocking circles. b. a wheel and spokes. c. a set of parallel lines. d. a tree. e. segmented bars.

Biology & Microbiology