Microorganisms & Viruses

Microorganisms & Viruses

1. main characteristics

2. role in the nitrogen cycle & others

3. pathogens & vectors

Multiple Select

Choose the characteristics of bacteria (more than one)

• unicellular

• autotroph

• has plasmid

• has nucleus

Multiple Choice

identify the name of the bacteria based on the shape

• Streptococcus pneumoniae

• Bacillus subtilis

• Vibrio cholerae

• Spirillum volutans

Multiple Choice

Autotrophic Protozoa and algae are not classified under plants. why?

• unable to carry out photosynthesis

• plants can't move

• do not have leaves, stem and root

Multiple Choice

What would happen to this nitrogen cycle if a virus killed all the bacteria?

• Nitrogen would just keep on cycling

• The cycle would stop

• Plants would take over for the bacteria

• Fish would grow more because there's no bacteria

Multiple Choice

A correct path that nitrogen could take would be _____

• air -> animals->plants->bacteria

• animals->air->bacteria->plants

• air -> bacteria ->plants -> animals

• bacteria ->air -> animals->plants

Multiple Choice

Which nitrogen cycle process is occurring when bacteria convert ammonium to nitrite and then into nitrate?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Multiple Select

Where can nitrogen fixing bacteria be found

• Free living in the soil

• under the leaves of flowering plants

• in the atmosphere

• living on the nodules of certain plants

Multiple Choice

We need nitrogen to make

• proteins

• enzymes

• cells

• all of these

Multiple Choice

Which of these nitrogen molecules would be present in the atmosphere?

• NH₃

• NH₄⁺

• NO₃^-

• N₂

Multiple Choice

Which of these nitrogen molecules would be present in the atmosphere?

• NH₃

• NH₄⁺

• NO₃^-

• N₂

Multiple Select

Microorganisms play a role as a (can choose more than one option)

• Comensals

• Symbionts

• Producers

• Decomposers

Multiple Choice

The diagram shows a composting machine to make compost from food and organic waste. Which organism is involved in the process using this machine?

• Algae

• virus

• bacteria

• protozoa

Multiple Choice

The diagram below shows a protist, Micrasterias sp. It Is classified as an autotrophic protist. Why?

• Because it obtains food by eating other organisms

• Because it can synthesise its own food

• Because it cannot absorb nutrients from food molecules

• Because it can absorb nutrients from food molecules

Multiple Choice

Harmful or Helpful: Bacteria decomposes dead leaves and animals

• Helpful

• Harmful

Multiple Choice

Harmful or Helpful: Bacteria decomposes dead leaves and animals

• Helpful

• Harmful

Fill in the Blanks

A pathogen is an organism that causes

.

Multiple Choice

Which of the following is not a vector?

• Bacteria

• Rat

• Tick

• Mosquito

Fill in the Blanks

are organisms that transmit pathogens and cause certain diseases

Multiple Choice

identify the vector in the statement

• dengue virus

• Aedes aegypti

Multiple Choice

Which of the diseases below causes the sufferer to cough up blood?

• Leishmania

• Chicken pox

• Flu

• TB (Tuberculosis)

Multiple Choice

Which vector could lead to a malaria epidemic?

• fly
• bat
• mosquito

Multiple Choice

Which type of pathogen is responsible for causing the flu, chickenpox, and yellow fever?

• viruses

• parasites

• fungi

• bacteria