#Question id: 171
#Unit 1. Molecules and their Interaction Relevant to Biology
An amino acid with two chiral carbon atoms
#Question id: 287
#Unit 1. Molecules and their Interaction Relevant to Biology
Which are the products of the RNase A-catalyzed hydrolysis of pGpApUpApApCpG?
#Question id: 3824
#Unit 3. Fundamental Processes
State whether the following statements is true/false regarding DNA replication.
1. The polymerization of DNA is essentially irreversible due to the hydrolysis of pyrophosphate.
2. On average about twenty errors are made during each replication of the human genome.
3. DNA polymerase I possesses 5ʹ → 3ʹ exonuclease activity.
4. All DNA ligase enzymes use ATP as a cosubstrate.
5. The purpose of SSB is to prevent single-stranded DNA from folding back on itself to form double-helical regions.
#Question id: 11849
#Unit 6. System Physiology – Plant
According to chemiosmotic model for polar auxin transport, auxin _____A_______is driven by the______B________ across the plasma membrane, while auxin ___C_____is driven by the_________D_________
#Question id: 2677
#Unit 2. Cellular Organization
Why is the transcription of structural genes of the trp operon turned off in the presence of tryptophan?