It is imperative to use aseptic techniques whe handling microbial cultures because aseptic techniques:
1. reduce contamination of your cultures from enviornment
2. reduce contamination/transfer of bacteria between different culture smears
3. helps to isolate a single microorganism to get a culture smear of
Enzymes bind with chemical reactants called substrates. There may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products.
Ans. Phenylalanine.
Genetic codes or codons are triplet codes, made up of three nucleotides. Each genetic code codes for a particular amino acid during translation. There are total 64 codons, out of which 61 codes for amino acids, while 3 act as stop codons.
According to Universal Genetic Code chart, first genetic code is UUU that codes for phenylalanine amino acid.
Thus, the correct answer is option). 'phenylalanine.'
