Thymine makes up 28% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be guanine?

#Question id: 1913

#Section 2: General Biology

The fetus can be protected from maternal transplantation attack by:

#Question id: 17660

#Section 4: Fundamentals of Biological Engineering

#Question id: 4338

#Section 3: Genetics, Cellular and Molecular Biology

Altering patterns of gene expression in prokaryotes would most likely serve an organism's survival by __.

#Question id: 10134

#Section 2: General Biology

Some herbicides such as dichlorophenyldimethylurea (DCMU, also known as diuron) and paraquat, block photosynthetic electron flow from where ?

a.) DCMU blocks electron flow at the quinone acceptors of PSII, by competing for the binding site of plastoquinone that is normally occupied by PQB

b.) Paraquat accepts electrons from the early acceptors of PSI and then reacts with oxygen to form superoxide, O2 – , a species that is very damaging to chloroplast components

c.) DCMU blocks electron flow at the pheophytin acceptors of PSII, by competing for the binding site of pheophytin

d.) Paraquat accepts electrons from the Iron-sulfur system of PSI and then reacts with oxygen to form superoxide, O2 – , a species that is very damaging to chloroplast components

Which of the following combination is true?

#Question id: 27274

#Section 5: Bioprocess Engineering and Process Biotechnology

In a batch reactor, which one of the following is true regarding specific growth rate?