Biology
One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

You are infected by a virus
You need an antiseptic, not an antibiotic
You need to be vaccinated instead of taking an antibiotic
Having waited a day, it is too late to take an antibiotic

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Biology
Which one of the following statements regarding haemoglobin is correct?

Haemoglobin of RBC can carry only carbon dioxide
Haemoglobin is only used for blood clotting and not for carrying gases
Haemoglobin present in RBC can carry only oxygen but not carbon dioxide
Haemoglobin of RBC can carry both oxygen and carbon dioxide

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