1
About viruses and viruses, check a correct alternative:
Flu and AIDS are examples of diseases caused by viruses.
All viruses are capable of causing disease in humans.
As viruses are transmitted exclusively through the respiratory tract.
2
Viruses are very small and simple “beings” that can infect any type of organism (plants, animals, fungi, bacteria and protists). Regarding viruses, it is correct to state that:
The protein layer that surrounds the virus nucleic acid is called capsid.
Viruses do not need other organisms for their reproduction.
All viruses have DNA as their genetic material.
3
Read and analyze the statements below: I - Bacteria have only one genetic material, DNA or RNA. II - The bacterial chromosome is encased around a histone protein. III - The bacteria have only one chromosome, which is circular, and some have a genetic material called plasmid, which is dispersed in the cytoplasm. IV - Through the transduction process, many bacteria exchange genetic material with other bacteria. Check the correct alternative.
All statements are true.
Only statement III is true.
Only statements I, III and IV are true.
Only statements I and II are true.
4
There are several types of diseases that can be caused by water. They are so named when caused by organisms or other contaminants spread directly through water. In places with poor basic sanitation (lack of treated water and / or sewage network or adequate alternatives for the disposal of human waste), diseases can occur due to water contamination by these waste or contact with sewage discharged into the streets. or in streams and rivers. Check the option in which the disease does NOT fit into the set of infectious diseases that can be transmitted through waters contaminated with microorganisms.
Typhoid fever
Cholera
Hepatitis A
AIDS
5
Check the alternative in which all the diseases mentioned are viral:
Herpes, condyloma acuminata, hepatitis and mononucleosis
Leishmaniasis, AIDS, syphilis and tetanus.
Chickenpox, rubella, mumps, tetanus
Yellow fever, dengue, AIDS and botulism
