Explain how antibiotics target bacterial processes and why they do not treat viral replication.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2022–2024.
Why can an antibiotic selectively inhibit a susceptible bacterial pathogen? A. It interferes with a bacterial process that differs from or is absent in human cells B. It directs human antibodies to bind every virus C. It stops mitosis as the bacterium’s method…
Suggest two factors that could affect antibiotic action on this community.
A model screening experiment compares bacterial growth on agar with and without a test substance. Outline how to carry out this experiment.
Why does an antibiotic targeting bacterial cell-wall synthesis not directly treat a viral infection? A. Viruses have bacterial walls that are thicker than usual B. Viruses lack the bacterial cell-wall process targeted by the drug C. The antibiotic changes into…
A model culture tests four antibacterial preparations on a bacterial lawn. X is a control disc. The plate is incubated at25°C for36hours before the schematic result is recorded. (i) Analyse the effects of the four preparations. (ii) Outline one reason for…
Why is an antibiotic directed at bacterial metabolism ineffective against an influenza virus? A. All viruses have become resistant by previously surviving antibiotics B. The virus lacks the independent metabolic machinery targeted by the drug C. Every virus…
Inheritance and cell division contribute to biological variation. (a) Draw and label one RNA nucleotide. (b) Distinguish mitosis from meiosis. (c) Explain how natural selection can produce antibiotic resistance in a bacterial population.
Which processes can make pathogen control more difficult? I. Selection of antibiotic-resistant bacteria. II. Genetic changes producing new pathogen variants. III. Antibiotics acting as an effective treatment against every virus. A. I and II B. II and III C. I…
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.