Unicellular organisms don’t contain membrane-bound organelles, while the cells of multicellular organisms contain membrane-bound organelles such as the nucleus. In a unicellular organism, the cell carries out all cellular processes, while in the cell of a multicellular organism, different cells have different jobs.
Where the optic nerve exits the back of the eye
Sexual reproduction increases genetic variation while asexual reproduction has less genetic variation
The given statement is False.
For a source of water pollution the pollutant can be any undesirable substance present in water.
These undesirable substances can be biological, physical or chemical.
Biological substances such as harmful microorganisms or physical substances such as plastic, garbage and other substances present in water can also be considered as the water pollution.
The chemicals, and other substances are considered as the source of water pollution.
A certain bacterial mRNA is known to represent only one gene and to contain about 800 nucleotides. If you assume that the average amino acid residue contributes 110 to the peptide molecular weight, the largest polypeptide that this mRNA could code for would have a molecular weight of about _______.
A) 800.
B) 5,000.
C) 30,000.
D) 80,000.
E) An upper limit cannot be determined from the data given
Answer:
c. 30,000
Explanation:
The gene has a total of 800 nucleotides and would be transcribed into an mRNA having about 800 nucleotides. The nucleotides of mRNA are read in the form of genetic triplets. This means that the mRNA with 800 nucleotides would have about 800/3= 266.66 or 266 genetic codes. This mRNA would be translated into a polypeptide chain having around 266 amino acids.
One amino acid contributes 110 to the molecular weight. The total molecular weight of the largest possible polypeptide that can be encoded by the said gene would b 266 x 110= 29260 (around 30,000).
