Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

#Question id: 14501

#SCPH01 Biochemistry

#Question id: 3657

#SCPH01 Biochemistry

Mutations in excision repair genes or a translesion DNA polymerase cause:

#Question id: 804

#SCPH05 I Biotechnology

With respect to microRNAs, which, if any, of the following statements, is false?

a) A microRNA normally works by binding to perfectly complementary sequences within an RNA transcript, usually an mRNA.

b) Like the great majority of mRNAs an miRNA is usually produced as a larger precursor RNA that is capped and has a 3’ poly(A) tail.

c) The precursor miRNA undergoes different types of post-transcriptional cleavage by endoribonucleases that are specific for double-stranded target sequences.

d) A nuclear endoribonuclease called dicer cleaves the miRNA precursor so that it forms a stem-loop RNA.

#Question id: 3433

#SCPH06 I Botany

Which of the following is true about imprinting?

#Question id: 2643

#SCPH28 | Zoology

 If in an experiment you mutate the two trp codons in the attenuator to ala codon what will be the impact on repression?