Strict anaerobes cannot live in the presnece of oxgyen because: a.)they have to mitochondria b.) they cannot absord nutrients from the envioment c.)they cannot make macromolcules d.) they lack detoxifing enzymes e.) they cannot make ATP oragnisms need phosphorous to incoroprate it in their: a.) cell membrane b.) DNA and RNA c.) ATP d.) a and c e.) a, b, and c

Different strains of Streptococcus pyogenes have different virulence factors, giving these microbes much versatility. Virulence factors include which of the following? Choose one or more: A.A capsule that, when thick, will help the organism avoid phagocytosis by macrophages B.A cell wall containing lipoteichoic acid, thought to facilitate adherence to pharyngeal epithelial cells C.Enzymes that lyse blood cells (streptolysins) D.The production of several endotoxins called streptococcal pyogenic endotoxins (SPEs)

The time interval required for the formation of two cells from one is called the A) generation time. B) growth time. C) growth rate. D) division rate.

When my environment dries out, i am capable of losing all the water from my body and surviving in this dormant state for many years in the chance that water may someday return. This unique truck I preform is called... 1.) Autohydro resuscitation  2.) Torpor 3.) Dessication 4.) Bioaqueous estivation  5.) Anhydrobiosis

a) Biofilm is:   a. a complex established community of microorganisms on solid surfaces   b. is a layer of millions of identical bacteria on solid surfaces   c. is a layer of compounds released from the tissue as a protection against pathogenic microorganisms   d. All of these are correct b) Capsule formation is associated with the virulence of pathogenic bacteria. Why? Select all that apply.   a. They are sticky and attach better   b. They can escape phagocytosis   c. The capsule makes them grow/multiply faster   d. They kill immune cells

If you discover new bacteria from the sands of Culebra's beaches that have the ability to degrade plastids, how would you identify these bacteria? Explain the methods you would use before reporting your discovery. What tests would you do to prove that they are not from the Enterobacteriaceae family? Discuss in at least 3 paragraphs.

Which condition is correct based on the growth of cells at the beginning? A) Cells are in small numbers B) Cells in a large quantity C) The number of cells is insignificant

1) What cell would a metabolically active form of prokaryotes?? a) living b) vegetative c) active d) sporulative e) cystic   2) Categroize the "possible answers descriptions (which are attributes and classifications)" in the image to the bacteria:

12. A differential media  a) allows visual distinction between bacteria to perform a specific biochemical process b) inhibits the growth of certain bacteria c) will only grow Gram-negative bacteria d) is a selective media

Antibiotics are very important in modern medical treatment: a) How is Giardia, a eukaryotic pathogenic parasite, affected by penicillin? Explain your answer. b) Is it beneficial to use sulfonamide and trimethoprim at the same time to treat an infection? Motivate your answer.