Question

QUESTION 1 Which of the following is (are) correct? The scientific name Homo sapiens indicate human beings are in the species is homo, while the genus is sapien. @ Woese-Fox proposed the present domain system. Natural selection is one mechanism leading to evolution. The sugar ribose is found in DNA but not in RNA.

Answer 1

1. Woese-Fox proposed present domain system- Carl woese proposed a three domain system in 1990 which states thet cellular life is classified into archaea, bacteria and eukaryotes.
Natural selection is one mechanism leading to evolution- the five mechanisms of evolution are mutation, non-random mating, genetic drift, gene flow and natural selection.
In the term homosapiens- homo is genus and sapiens is species.
Both DNA and RNA have 5-carbon sugars ribose.

2. Only primary structure will not be affected.
Denaturation disrupts the normal alpha-helix and beta sheets in protein. It occurs due to the bonding interactions and disrupts only secondary and tertiary structures of proteins.

3. Bioremediation helps prevent pathogenic bacteria from spreading.
Bioremediation means the use of naturally occuring bacteria to breakdown environmentl pollutions. this does not prevent the spread of other pathogens.
All the remaining choices are correct.

4.Phospholipids because they have hydrophilic and hydrophobic part.
The plasma membrane consists of phospholipid bilayer that is madeup of two layers of lipid molecules.
These bilayers have hydrophilic head and a hydrophobic tail. These structures form a continous barrier around the cells.