The cell membrane is a rigid structure that provides bacteria with their characteristic shapes.
Answer the following statement true (T) or false (F)
False
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Scientists have found that polypeptides that are normally synthesized in the endoplasmic reticulum are about 20 amino acids longer when they are synthesized by ribosomes not attached to the endoplasmic reticulum
What is a possible explanation for the greater length of these polypeptides? A) Ribosomes attached to the endoplasmic reticulum require fewer amino acids to function. B) The 20 amino acids serve as a signal (peptide) sequence that directs the forming polypeptides to the endoplasmic reticulum, where they are cleaved off during processing. C) The 20-amino-acid sequence helps the endoplasmic reticulum package these proteins for shipping to the Golgi. D) The protein has a different function in the cytosol than in the endoplasmic reticulum.
Which of the following statements is TRUE of selective toxicity?
A) Selective toxicity takes advantage of structural differences between host and pathogen. B) To be effective, an antimicrobial agent must be more toxic to the patient than the pathogen. C) Selective toxicity takes advantage of metabolic differences between host and pathogen. D) Antimicrobial agents must target structural differences between host and pathogen and be more toxic to the patient than the pathogen. E) Selective toxicity takes advantage of structural and/or metabolic differences between host and pathogen.
Agar is used as a solidifying agent in microbiological media since few bacteria can degrade it
Indicate whether the statement is true or false
Identical twins are genetically the same but do not always look or act exactly alike. Propose a hypothesis to explain this
What will be an ideal response?