Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?

TLS Online TPP Program

#Question id: 6966

#XL - T Zoology

During gastrulation in the frog, the very first cells to move into the interior of the embryo through the blastopore come from the surface layer of cells in the marginal zone; they will become:

TLS Online TPP Program

#Question id: 9267

#XL - S Microbiology

Three living species X, Y, and Z share a common ancestor T, as do extinct species U and V. A grouping that consists of species T, X, Y, and Z (but not U or V) makes up

TLS Online TPP Program

#Question id: 3661

#XL - S Microbiology

______________ short fragment of DNA produced during replication of the lagging strand.

TLS Online TPP Program

#Question id: 20247

#XL - P Chemistry

C₂H₆ (g) + 3.5 O₂ (g) →2CO₂ (g) + 3H₂O (g)

ΔSvap (H₂O, l) = x1 cal K^–1 (boiling point + T₁)

ΔHf (H₂O, l) = x₂

ΔHf (CO2) = x₃

ΔHf (C2H6) = x₄

Hence ΔH for the reaction is –

TLS Online TPP Program

#Question id: 5742

#XL - S Microbiology

When an allotetraploid (AABB) is backcrossed to one of its progenitor species (AA), a sterile progeny is produced.  The genomic composition of this sterile individual can be best represented by