Phloem loading in the apoplastic pathway thought to mediate the transport of sucrose from the apoplast into the sieve element– companion cell complex. Which of the following  are involved in such sucrose transporting by apoplast?

a) Sucrose is at a higher concentration in the sieve element–companion cell complex indicates that sucrose is actively transported against its chemical-potential gradient

b) Sugars transport from the apoplast into the sieve elements and companion cells energy driven process

c) Phloem loading in the apoplastic pathway involves a sucrose–H+ symporter

d) the route of phloem loading is−mesophyll cells→ bundle sheath cells→ phloem parenchyma cell→ ordinary companion cell→ sieve elements

Which of the following is incorrect?

TLS Online TPP Program

#Question id: 2716

#Unit 2. Cellular Organization

With respect to assembly of every core histone which of the following is wrong?

TLS Online TPP Program

#Question id: 2717

#Unit 2. Cellular Organization

To reseal the DNA backbone where does topoisomerase gets the energy from?

TLS Online TPP Program

#Question id: 2719

#Unit 2. Cellular Organization

The distinct zig-zag appearance of the chromatin fibre is due to ____________

TLS Online TPP Program

#Question id: 2720

#Unit 2. Cellular Organization

In one strand of a double stranded DNA the rate of occurrence of A is 3 times C in consecutive 10 bases. So how many G will be there in 100 base pairs of a DNA duplex? [Consider G=T in one strand].

TLS Online TPP Program

#Question id: 2721

#Unit 2. Cellular Organization

With respect to Histone H1 DNA packaging which of the following is false?

TLS Online TPP Program

#Question id: 2722

#Unit 2. Cellular Organization

Which type of supercoiling takes the form of extended right-handed coils?