Cell walls commonly are classified into two major types. This classification is based not on structural or biochemical differences;

A) primary walls and

B) secondary walls

i) walls formed during cell growth

ii) walls that are formed after cell enlargement stops

iii) multilayered walls that are strengthened and waterproofed by lignin

iv) Usually they are thin and simple, but sometimes may be thick and multilayered, such as those found in collenchyma or in the epidermis

v) highly specialized in structure and composition, reflecting the differentiated state of the cell

Which of the following correctly represents features of primary and secondary walls?

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#Question id: 19798

#Unit 12. Applied Biology

Resistance to Cry proteins may be due to 

1. reduced binding of the toxin to midgut epithelium 

2. complete degradation of Cry proteins

3. Increased binding of the toxin to midgut epithelium 

4. Antisense inhibition of the transcript

Which of the following options is correct?

TLS Online TPP Program

#Question id: 19799

#Unit 12. Applied Biology

Resistance to cry proteins may be due to _________binding of the toxin to midgut epithelium

TLS Online TPP Program

#Question id: 19800

#Unit 12. Applied Biology

What happens to cry protiens which is due to reduced binding of the toxin to midgut epithilium

TLS Online TPP Program

#Question id: 19801

#Unit 12. Applied Biology

The inheritance of resistance to Cry proteins in insect populations is usually _______ and is governed by one or few major genes

TLS Online TPP Program

#Question id: 19802

#Unit 12. Applied Biology

The low expression level of cry genes seems to be due to the presence in them of sequences not commonly found in plant coding regions. Such as

(1) Localized A+T-rich regions resembling plant intrans 

(2) 18 potential plant polyadenylation signal sequences 

(3) 13 ATTTA sequences, which destabilize mRNA

(4) Codons that are rarely used in plants

Which of the above statements are correct?                

TLS Online TPP Program

#Question id: 19803

#Unit 12. Applied Biology

Cowpea trypsin inhibitor (cpti), serine protease inhibitor (aprotinin), are all used as alternative insecticidal proteins. They are inhibitors of