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TLS Online TPP Program

#Question id: 2737

The linking number (Lk) of a closed-circular, double-stranded DNA molecule is changed by:

#SCPH05 I Biotechnology

  1. breaking a strand, unwinding or rewinding the DNA, then rejoining it.

  2. breaking all hydrogen bonds in the DNA.

  3. supercoiling without the breaking of any phosphodiester bonds.

  4. underwinding without the breaking of any phosphodiester bonds.

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TLS Online TPP Program

#Question id: 8703

#SCPH28 | Zoology

In a comparison of birds and mammals, having four limbs is ________.
TLS Online TPP Program

#Question id: 2314

#SCPH06 I Botany

Mitochondria are inherited from.
TLS Online TPP Program

#Question id: 5093

#SCPH01 Biochemistry

Which of the following is a result of gastrulation in animals?

I) The archenteron is formed.

II) The body axes are established.

III) The germ layers are formed.
TLS Online TPP Program

#Question id: 14104

#SCPH05 I Biotechnology

All the following are nucleotide sequence databases except
TLS Online TPP Program

#Question id: 3518

#SCPH06 I Botany

Assume that the trihybrid cross AA BB rr X aa bb RR is made in a plant species in which A and B are dominant but there is incomplete dominance between R and r. Consider the F2 progeny from this cross, and assume independent assortment. The phenotypes appear in this F2 progeny?