Expansins belong to a large superfamily of proteins, divided into two major expansin families, α-expansins (EXPAs) and β-expansins (EXPBs), what is the function of these two?

a) EXPAs are more active on eudicot cell walls,whereas EXPBs are more active on grass cell walls

b) EXPAs are more active on grass cell walls, whereas EXPBs are more active on eudicot cell walls

c) EXPAs loosen cellulose–cellulose junctions containing xyloglucan, whereas EXPBs loosen wall complexes containing GAX

d) EXPAs loosen wall complexes containing GAX, whereas EXPBs loosen cellulose–cellulose junctions containing xyloglucan

Which combination is correct from some given above functions of expansins,?

#Question id: 5284

#Unit 8. Inheritance Biology

DNA from a strain of Bacillus subtilis with genotype a+b+ c+d+ e+ is used to transform a strain with genotype a - b- c- d-   e-. Pairs of genes are checked for co-transformation and the following results are obtained:

Pair of co-transform genes as follow

D-E,             E-C,                C-B,                  A-D

On the basis of these results, what is the order of the genes on the bacterial chromosome?

#Question id: 5285

#Unit 8. Inheritance Biology

A transformation experiment is carried out using donor DNA that is A+B+C+ and a recipient that is A-B- C-. A+ transformants are selected and tested further. Of these, 64% are B+ and none are C+. Also, B+ are selected, and 8% are also C+. What is the gene order

#Question id: 5286

#Unit 8. Inheritance Biology

An Hfr strain with genotype A B C D (each gene for amino acid synthesis )and that transfers the A gene very late was mated with recipient strain with genotype a b c d. After mating for several hours, the mixture was diluted and plated on minimal media with four different supplements having various number of colony

Media supplement with amino acid  

                 Colony                                          number

                  A+C                                                 500

                  C+D                                                  50

                     B                                                    10

                     A                                                   250

What is order of gene

#Question id: 5287

#Unit 8. Inheritance Biology

Interrupted matting of different Hfr strain with F- E.coli cell resulting generation of following strain  Order of gene is

#Question id: 5288

#Unit 8. Inheritance Biology

Donor strain of bacteria with His+ Ara+ Met+ Leu+ Cys+ Lys+ is infected with phages to map the donor chromosome with generalized transduction .The Phage lysate from bacterial cell is collected and use to infect second strain of bacteria that are His- Ara- Met- Leu- Cys- Lys- . Different transducing phages are selected on using different minimal media and their presence of growth (+) and absence of growth (-) given in table

Which of the following is correct order of gene?

#Question id: 5289

#Unit 8. Inheritance Biology

A donor strain of bacteria with genes a+b+c+ is infected with phages to map the donor chromosome with transduction. The phage lysate from the bacterial cells is collected and used to infect a second strain of bacteria that are a_ b_ c_.

Based on the above, which one of the following conclusions is correct?