Profiles of which component of the membrane may be used to identify certain kinds of pathogens?
a)proteins
b)polysaccharides
c)leaflets
d)phospholipids
e)fatty acids
Barely ____________% of all microbial species can be cultured in the laboratory.
a10
b)25
c)1
d)50
e)0.1
Which of the following is a dormant form of bacteria resistant to desiccation and other natural stresses?
a)ribosome
b)magnetosome
c)endospore
d)mitochondria
e)chloroplast
Which of the following is true of all biofilms?
a)The EPS may be protein or polysaccharide.
b)They only contain a single species.
c)The EPS is secreted by the bacteria.
d)Cells in the biofilm are dormant until the bacteria leave the biofilm.
e)It is a continuous monolayer surface deposit.
The eukaryotic predators of the microscopic world are
a)viruses.
b)algae.
c)bacteria.
d)protists.
e)cyanobacteria.
I can't figure out my extra credit problems. I think for #1 is a, #2 is either c or e, #4 is a, and #5 is a. I am not sure those are right or what #3 is. Can I get some help please. Thank You
Of course, I can help you with that! Let's go through each question one by one.
1. Profiles of which component of the membrane may be used to identify certain kinds of pathogens?
The answer is a) proteins. To identify certain kinds of pathogens, the profiles of proteins in their membrane can be analyzed. Proteins on the pathogen's membrane can act as unique markers that help in their identification.
2. Barely ____________% of all microbial species can be cultured in the laboratory.
The answer is c) 1. Only about 1% of all microbial species can be cultured in the laboratory. This means that the vast majority of microbial species are currently unknown and cannot be grown under laboratory conditions.
3. Which of the following is a dormant form of bacteria resistant to desiccation and other natural stresses?
The correct answer is c) endospore. Endospores are a dormant form of bacteria that are highly resistant to desiccation (drying out) and other natural stresses. They are capable of surviving harsh conditions until more favorable conditions arise.
4. Which of the following is true of all biofilms?
The correct answer is a) The EPS (extracellular polymeric substance) may be protein or polysaccharide. Biofilms are communities of microorganisms that adhere to surfaces and are surrounded by an EPS. The EPS can be composed of proteins, polysaccharides, or a combination of both.
5. The eukaryotic predators of the microscopic world are:
The correct answer is d) protists. Among the given options, protists are the eukaryotic predators of the microscopic world. They are a diverse group of organisms that include amoebae, ciliates, and flagellates, among others, and they feed on bacteria and other microscopic organisms.
Based on your answers for the extra credit problems:
1. For #1, your answer of a) proteins is correct.
2. For #2, your answer of c) 1 is correct.
3. For #3, the correct answer is c) endospore.
4. For #4, the correct answer is a) The EPS may be protein or polysaccharide. So your answer is correct.
5. For #5, the correct answer is d) protists. So your answer is correct.
You did a great job! Let me know if there is anything else I can help you with.