iruses that kill host cells are (a) lysogenic (b) lytic (c) viroids (d) prophages (e) temperate

Q: Isolates of Corynebacterium diphtheriae cause disease only if they carry a lysogenic bacteriophage…

A: Diphtheria is mostly caused by Corynebacterium diphtheriae. It is a gram-positive rod-shaped…

Q: Doctors prescribe synergistic drug combinations to treatbacterial infections. The purpose of such…

A: Synergistic drug combinations comprise multiple active pharmaceutical ingredients and are widely…

Q: The genome of a virus consists of (a) DNA (b) RNA (c) prions (d) DNA and RNA (e) DNA or RNA

A: Viruses are obligate parasites that can reproduce only inside the host cells. They also do not have…

Q: In his work with pneumonia-causing bacteria andmice, Griffith found that(A) the protein coat from…

A: Griffith has conducted experiments on mice by injecting live and dead strains of bacteria inside…

Q: Which of the following is mismatched?a) Plasmodium —malariab) Trypanosomes—dysenteryc)…

A: Step 1 Kingdom Protista or Protoctista is the kingdom of all unicellular and colonial eukaryotes…

Q: The evolution of the highly complex eukaryotic cell was possible because.. A) Mesosomes released…

A: Correct answer is (B). Two different prokaryotic bacterial species entered the complex cells as endo…

Q: Which of the following viruses requires a surrogate virusinfection in order to cause disease?(a)…

A: In efficacy testing, the chemical inactivation cannot be determined for all viruses, because some…

Q: As a taxonomic category, Protozoa is a/an…    A) ... order.   B) ... kingdom.   C) ... class.   D)…

A: The taxonomy is a branch of science that deals with the classifications and systematics of the…

Q: Why does the Ebola virus generate such severe symptoms in a human host? (Hint: What is the…

A: virus were some of the first replicating systems . they have evolved many times and have become more…

Q: not a viral disease ? (a) AIDS and mumps (b) Small pox and herpes (c) Influenza (d) Cholera

A: Viral disease is an infectious disease, which is widespread, and caused by virus. There are so many…

Q: What is it about clams that make them especially likelysources of human infection?(a) They have…

A: Answer is d.) they are filter feeders, obtaining food by filtering water and extracting microbes.

Q: HIV has a high mutation rate due to the imprecise opera-tion of its:(a) Viral membrane(b) CD4…

A: HIV (human immunodeficiency virus) is responsible for causing AIDS (acquired immune deficiency…

Q: Viruses that can induce defects during embryonic or neona-tal development (teratogenesis) in humans…

A: Teratogens may be defined as any agent which distrupt the normal and complete development of an…

Q: Cephalosporins resemble which antibiotic in their mode ofaction and their structure?(a)…

A: A type of antimicrobial substance that is active against bacteria is an antibiotic. It is the most…

Q: Bacteria such as Mycoplasma that lack cell walls are:(a) Sensitive to penicillin(b) Resistant to…

A: Bacteria are unicellular prokaryotic organisms which are devoid of membrane bound organelles and…

Q: and efficacy data for a vaccine that is greatly needed in this region." In Africa, there have been…

A: Malaria is a disease caused by the parasites and transmitted by the mosquitoes bite.This disease…

Q: The extensive use of antibiotics as well as gene transfer hasled to more virulent,…

A: Chemical agents that are used to treat diseases are called chemotherapeutic agents. Those agents…

Q: Because most pathogens cannot survive for extended peri-ods of time outside the body, they must…

A: An infectious agent that upon entry harms the body and causes the disease is called a pathogen. The…

Q: The most likely checkpoint to be 'ignored' by malignant cells is the _____     a)  G2/M checkpoint…

A: In cell division there are 3 checkpoints-  G1/S checkpoint G2/M checkpoint & Spindle check…

Q: Bacteriophages that can enter into stable, long-term rela- tionships with their hosts are called:…

A: Viruses that infect bacteria are known as phages or bacteriophages. These organisms have a…

Q: Penicillins have no effect on Mycoplasma pneumoniaebecause:(a) Mycoplasmas are viruses(b)…

A: Answer -Penicillin is the antibiotic that affects the growth of bacteria and kills them. It breaks…

Q: Which structure is “slimy” in texture and may protect a prokaryotic cell from destruction by our…

A: Bacteria and archaea are prokaryotic cells having different internal and external features from…

Q: Endospores (a) are formed by some viruses (b) are extremely durable cells (c) are comparable to the…

A: Bacteria are the most important microorganisms to the food processor. Some bacteria are beneficial…

Q: 3. (a). Illustrate and describe the lytic and lysogenic cycles for the production of viruses. (b).…

A: Introduction :  A prokaryotic organism with only one cell is a bacteria. They lack a nucleus and…

Q: Any memorization device that helps a person recall information a) Mind mapping b) Mnemonic c)…

A: Information that is recalled means that information is retrieved through a memory bank placed in our…

Q: Plant viruses (a) typically cause rapid death of infected plants (b) are mainly retroviruses (c) can…

A: Answer is e.) Can be transmitted from one generation to the next to infected seeds.

Q: One of the common defense mechanisms pathogenic bacte­ria have to avoid phagocytosis is the presence…

A: A bacterial capsule is composed of either monosaccharides or a mixture of polysaccharides and amino…

Q: Which of these would be evidence against endosymbiosis? a) chloroplast have their own DNA O b) their…

A: Endosymbiosis: It can be defined as a relationship between two organisms where one organism lives…

Q: Which of the following is a reason that scientists do not classify viruses as living things? A.…

A: Qusstion - Which of the following is a reason that scientists do not classify viruses as living…

Q: When a virus invades a living cell, its (———-)takes over the cells functions. (Fill in the dash) a.)…

A: Introduction :  Viruses are microscopic, non-cellular infectious organisms that can only reproduce…

Q: A bacterium that has had its cell wall removed is called:(a) A protoplast(b) A mycoplasma(c)…

A: Bacteria are single-celled prokaryotic organisms. These microbes possess cytoplasm, nucleus,  cell…

Q: Which of the cells in the diagram will eventually develop into macrophages? Courtesy Michael Ross,…

A: Leukocytes, otherwise called WBCs or white platelets, comprising moment particles called cytoplasmic…

Q: 20- Which organelle contains digestive enzymes and is involved in breaking down cellular waste and…

A: Cells are considered the elementary components of all living organisms. Some organisms contain a…

Q: The capsid of a virus consists of (a) protein subunits (b) nucleic acid (c) helical lipids (d) a…

A: Introduction:- Virus is a small, simple infectious agent that can only multiply in live cells of…

Q: Nematode specific genes were introduced into the tobacco host plant using a vector (A) pBR 322 JU…

A: Introduction:- A vector is a DNA molecule that is used in molecular cloning to intentionally…

Q: Which of the cells in the diagram will eventually develop into macrophages? Courtesy Michael Ross,…

A: We know that These include eosinophil, neutrophil, and basophil. Agranulocytes, on the other side,…

Q: Give any two differences between DNA and RNA. (b) What is recombinant DNA? Give two beneficial…

A: Differences between DNA and RNA DNA RAN Double stranded Single stranded Consists of…

Q: Fill in the gap with correct answers: 1. Obligate anaerobes cannot grow (and usually die)…

A: Before the onset of any process, the biological system gets ready for it to overcome the situation…

Q: Corona-virus disease 2019 (COVID-19) is a new disease, caused by a novel (or new) corona-virus that…

A: This virus is a novel virus though it existed in bats for several years but it never transmitted…

Q: In Saccharomyces cerevisiae (yeast), what is the term for the production of asexual cells? (a)…

A: Viruses are infectious microorganism made up of a genomic segment, either DNA or RNA, encased in a…

Q: Nematode specific genes were introduced into the tobacco host plant using a vector 1 (A) pBR 322 (B)…

A: Gene transfer is defined as the introduction of new DNA into an existing organism's cell by vectors.…

Q: Which protein is responsible for the ability of influenza virus to bind to epithelial cells?…

A: Influenza is commonly known as the flu. It is commonly caused by the influenza virus. The symptoms…