Question

1. a drug destroys the peptidoglycan molecules of a bacterial cell. which of the four main targets is affected in this scenario?

proteins
cellular synthesis
cell membrane
cell wall

1. thymine dimers are formed in dna, preventing replication. which of the four main targets is affected in this scenario?

cell wall
cellular synthesis
proteins
cell membrane

1. the native state of certain enzymes are destroyed by heat, and the active sites are no longer able to bind with substrate. which of the four main targets is affected in this scenario?

cell wall
cell membrane
cellular synthesis
proteins

1. the cell can no longer regulate the passage of materials in and out of the cell. which of the four main targets is affected in this scenario?

cell membrane
proteins
cell wall
cellular synthesis

Explanation:

1. Peptidoglycan is a major component of the bacterial cell wall. So, if a drug destroys peptidoglycan, the cell wall is affected.
2. DNA is involved in cellular synthesis (such as replication, transcription which are part of cellular processes). Thymine dimers in DNA preventing replication affects cellular synthesis.
3. Enzymes (which are proteins) having their native state destroyed by heat (denaturation) affects proteins.
4. The cell membrane is responsible for regulating the passage of materials in and out of the cell. If this regulation is lost, the cell membrane is affected.

Answer:

1. Cell wall
2. Cellular synthesis
3. Proteins
4. Cell membrane