The biphasic C4 system reduces photorespiration dramatically by increasing levels of CO2 near Rubisco to enable Rubisco carboxylation to outcompete the oxygenation reaction. 

TLS Online TPP Program

#Id: 660

#Unit 3. Fundamental Processes

G-tail is probably generated because there is a specific limited degradation of the C-A–rich strand.

TLS Online TPP Program

#Id: 5893

#Unit 3. Fundamental Processes

base pairs at the 3’ end of the primer, which are in the more open A-form. A sharp turn in the DNA exposes the template base to the incoming nucleotide

TLS Online TPP Program

#Id: 3635

#Unit 3. Fundamental Processes

A minimum of 32 tRNAs are required to translate all 61 codons (31 to encode the amino acids and 1 for initiation).

TLS Online TPP Program

#Id: 1007

#Unit 5. Developmental Biology

The dorsoventral patterning of the early Drosophila embryo is controlled by a regulatory protein called Dorsal.

TLS Online TPP Program

#Id: 696

#Unit 3. Fundamental Processes

1. The small fragment (35 kD) possesses a 5’– 3’ exonucleolytic activity, which excises small groups of nucleotides, up to 10 bases at a time.

2. This activity is coordinated with the synthetic/ proofreading activity. 

3. It provides DNA polymerase I with a unique ability to start replication in vitro at a nick in DNA.