Which of the following is the true cell wall found in the young dividing cells of the plant?
a) primary cell wall
b) secondary cell wall
c) middle lamella
d) glycocalyx
Which of the following substance is not present in the secondary cell of plant cells?
a) cellulose
b) hemicellulose
c) pectin
d) lignin
Which of the following is the outermost boundary of protoplasm?
a) cell wall
b) plasma membrane
c) nuclear envelop
d) plasmolema
Which of the following helps to stabilize the lipid bilayer membrane?
a) cholesterol
b) phospholipid
c) glycolipid
d) glycoprotein
All of the following functions are performed by membrane proteins except
a) transport channel
b) enzyme ATPase
c) receptor site
d) none of these
Some membrane proteins have enzymatic activity and convert ATP to………
a) ADP
b) cyclic AMP
c) GDP
d) GTP
