FREE BIOLOGY AND STUDY GAMES ABOUT BIO 112 EXAM

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FREE BIOLOGY AND STUDY GAMES ABOUT BIO 112 EXAM

2 Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -58 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Encouraging the growth (via nutrient fertilization) of photosynthetic protists in marine environments may help reduce global warming because?

Answer:

Photosynthetic protists fix atmospheric carbon dioxide, decreasing atmospheric carbon dioxide levels Question 2: Why is it important that ectomycorrhizal fungi (EMF) have peptidase enzymes?

Answer:

These enzymes are needed to release nitrogen from dead plant material in colder environments

Question 3: which traits do archaea and bacteria share

Answer:

presence of plasma membrane and lack of a nuclear envelope

Question 4: Long branching fungal filaments are called

Answer:

hyphae

Question 5: Why are mycorrhizal fungi superior to plants at acquiring mineral nutrition from the soil?

Answer:

Fungi secrete extracellular enzymes that can break down large molecules

Question 6: What places in eukaryotic cell contain genomes?

Answer:

mitochondria and chloroplast

Question 7:

Whenpathogenicfungiarefoundgrowingontherootsofvines,farmerssometimesrespondbycovering thegroundaroundtheirvineswithplasticsheetingandpumpingagaseousfungicideintothesoil. The most important concern of farmers who engage in this practice should be that the

Answer:

Fungicide might also kill mycorrhizae Question 8: In septate fungi, what structures allow cytoplasmic streaming to distribute needed nutrients, synthesized compounds and organelles throughtout the hyphae?

Answer:

pores in crosswalls Question 9: Viruses use the host's machinery to make copies of themselves. However, some human viruses require a type of replication that humans do not normally have. For example, humans normally do not have the ability to convert RNA into DNA. How can these types of

Answer:

the viral genome has genes coding for enzymes needed for its own reproduction Question 10: Why is it more difficult to treat fungal infections than baterial infections in humans

Answer:

Fungal and animal cells have similar proteins. Drugs used to destroy fungal cells could also disrupt animal cells Question 11: microbiologist use the gram stain to aid in identification of bacteria. What is the major difference between gram-positive and gram-negative bacteria?

Answer:

sugar

Question 12: why do RNA viruses require their own supply of certain enzymes

Answer:

host cells lack enzymes that can replicate the viral genome Question 13: Transcriptional regulation in eukaryotes includes processes such as alternative splicing that are not observed in bacteria or archaea. What changes occurred in the eukaryotic cell to make alternative splicing possible?

Answer:

spatial separation of transcription and translation

Question 14: What is the leading hypothesis on the origin of the nucleus?

Answer:

The nucleus was formed through in folding of the plasma membrane Question 15: Assume that some members of an aquatic species of motile, photosynthetic protists evolve to become parasitic to fish. They gain the ability to live in the fish gut, absorbing nutrients as the fish digests food. Over time, which phenotypic changes would yo

Answer:

Loss of chloroplast Question 16: According to the endosymbiosis theory of the origin of eukaryotic cells, how did mitochondria originate?

Answer:

From engulfed, originally free-living proteobacteria Question 17: t has been hypothesized that fungi and plants have a mutualistic relationship because plants make sugars available for the fungi's use. What is the best evidence in support of this hypothesis?

Answer:

Radioactively labeled sugars produced by plants eventually show up in the fungi with which they are associated

Question 18: What is the difference between an epidemic and a pandemic?

Answer:

Epidemic affects a large number of people within a community, pandemic spreads over multiple countries

Question 19: A particular species of protist has obtained a chloroplast via secondary endosymbiosis. How would you know this?

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The chloroplast only have three to four membranes Question 20: What are some of the organelles or cellular structures that all protists share?What are some of the organelles or cellular structures that all protists share?

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Nucleus, mitochondria, vacuole, golgi body, chloroplast and endoplasmic reticulum Question 21: among protists what term describes feeding by engulfing then digesting prey?

Answer:

Phagocytosis Question 22: what characteristics, structures or processes is common to bacteria and viruses

Answer:

genetic material composed of nucleic acid Question 23: When a mycelium infiltrates an unexploited source of dead organic matter, what are most likely to appear within the food source soon thereafter?

Answer:

fungal enzymes Question 24: you might be interested to know how many different types of bacteria live on the shower curtain in your bathroom. What is the most efficient method for finding out?

Answer:

seeding

Question 25: Why are protists considered to be a paraphyletic group?

Answer:

A trait common in a single monophyletic group but not generally found outside of that group Question 26: You just discovered a new virus. This virus infects heart muscle, where it causes inflammation, and has a very high mutation rate. Which of the following is the best strategy for finding a treatment for this virus?

Answer:

identify the receptor this virus uses and develop a drug that blocks the receptor