Explain the structure of the cyano bacterial cell -Biology

Explain the structure of the cyano bacterial cell -Biology
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Explain the structure of the cyano bacterial cell -Biology

Description : Explain the structure of the cyano bacterial cell -Biology

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Description : ______ helps in fixation of nitrogen in rice field in association with root of Cycas plant. a) rhizobium b)fungus c)cyano bacteria d)bacteria

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Description : What molecular structure is used to insert foreign DNA into a recipient bacterial cell that will replicate the foreign DNA -Biology

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What is the relationship between the observed gram reaction and bacterial cell wall structure?

Description : What is the relationship between the observed gram reaction and bacterial cell wall structure?

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What is the bacterial structure that acts as a selective barrier allowing nutrients to enter the cell and wastes to leave the cell.?

Description : What is the bacterial structure that acts as a selective barrier allowing nutrients to enter the cell and wastes to leave the cell.?

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What is the bacterial structure that acts as a selective barrier allowing nutrients to enter the cell and wastes to leave the cell.?

Description : What is the bacterial structure that acts as a selective barrier allowing nutrients to enter the cell and wastes to leave the cell.?

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Last Answer : d. They trigger antibody production.

What structure is very important for bacterial survival?

Description : What structure is very important for bacterial survival?

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Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following statement(s) is/are true concerning antimicrobial classes? a. Penicillins and cephalosporins share the compound structure of a b-lactam ring which binds to bacterial division plate proteins b. Tetracyclines and macrolides such as erythromycin inhibit bacterial ribosomal activity and therefore protein synthesis c. Aminoglycosides act in a similar fashion to tetracyclines and therefore are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Description : Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following ... are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Last Answer : Answer: a, b, d Penicillins, cephalosporins, and monobactams possess a b-lactam ring of some type and act to bind bacterial division plate proteins, thus inhibiting cell wall ... act in different mechanisms to inhibit protein synthesis, therefore two agents in combination act synergistically

Which one of the following is NOT a structure or subcompartment found in bacterial cells? a. Micro compartments b. Volutin c. Ribosomes d. Mitochondria

Description : Which one of the following is NOT a structure or subcompartment found in bacterial cells? a. Micro compartments b. Volutin c. Ribosomes d. Mitochondria

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$ DNA replication in a bacterial cell is bidirectional. ! A chromosomes with primary constriction is called "SAT" chromosomes.

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Difference between bacterial cell and plant cell in nitrogen fixatin

Description : Difference between bacterial cell and plant cell in nitrogen fixatin

Last Answer : Difference between bacterial cell and plant cell in nitrogen fixatin

Difference between bacterial cell and plant cell in nitrogen fixatin

Description : Difference between bacterial cell and plant cell in nitrogen fixatin

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difference between bacterial cell from function and nitrogen fixation

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Why bacterial cell is not considered a true animal cell?

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What are the main components of plant and bacterial cell wall?

Description : What are the main components of plant and bacterial cell wall?

Last Answer : Bacterial cell walls are different from the cell walls of plants and fungi which are made of cellulose and chitin, respectively. The cell wall of bacteria is also distinct from that of Archaea, which do not contain peptidoglycan.

structures surrounds the cytoplasm in a bacterial cell?

Description : structures surrounds the cytoplasm in a bacterial cell?

Last Answer : a cell wall or nueclues not sure

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Description : An enzyme which brings about lysis of bacterial cell wall is (A) Amylase (B) Lysozyme (C) Trypsin (D) Lipase

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Mean applied when deals with relative changes eg. Bacterial growth, cell division, population

Description : Mean applied when deals with relative changes eg. Bacterial growth, cell division, population

Last Answer : Ans. GM

The complement system consists of a series of serum proteins that exist in a quiescent or very low-level state of activation in the uninfected host. Which of the following statement(s) is/are true concerning complement activation? a. The alternate (properdin) pathway of complement activation can occur directly through contact with fungal or bacterial cell wall compounds b. Complement component fragments may serve to decrease vascular permeability c. Excessive complement activation can produce deleterious effects d. Fragments of certain complement components serve as chemoattractants to additional cellular components of the host defense mechanism

Description : The complement system consists of a series of serum proteins that exist in a quiescent or very low-level state of activation in the uninfected host. Which of the following ... certain complement components serve as chemoattractants to additional cellular components of the host defense mechanism

Last Answer : Answer: a, c, d Complement activation can occur through either classic or alternate (properdin) pathways, both of which eventuate in deposition of terminal complement pathway components on the ... and release of lysosomal enzymes that can directly damage certain target tissues, such as the lung

Increasing evidence has implicated gram-negative bacterial lipopolysaccharide (LPS endotoxin) as the portion of the gram-negative bacterial cell membrane responsible for many, if not all the toxic effects that occur during gram-negative bacterial sepsis. The following statement(s) is/are true concerning LPS and the host response. a. The LPS molecule can in itself cause physiologic responses similar to that seen during gram-negative bacterial sepsis b. LPS triggers host macrophages to release a variety of cytokines including TNF-a, IL-1a, and IL-1b, IL-6, and IFN-a c. Excessive cytokine production is not associated with detrimental consequences d. TNFa and IL-1b appear to be the primary mediators within the host, exerting deleterious effects on the host when excessive amounts reach the syst

Description : Increasing evidence has implicated gram-negative bacterial lipopolysaccharide (LPS endotoxin) as the portion of the gram-negative bacterial cell membrane responsible for many, if not all the ... host, exerting deleterious effects on the host when excessive amounts reach the systemic circulation

Last Answer : Answer: a, b, d The LPS molecule exerts diverse effects on the mammalian host. Immunologic responses to LPS include nonspecific polyclonal B-cell proliferation, macrophage activation and ... deleterious effects on the host only after large amounts are secreted and reach the systemic circulation

The most important mechanism by which gram negative bacilli acquire chloramphenicol resistance is (a) Decreased permeability into the bacterial cell (b) Acquisition of a plasmid encoded for chloramphenicol acetyl transferase (c) Lowered affinity of the bacterial ribosome for chloramphenicol (d) Switching over from ribosomal to mitochondrial protein synthesis

Description : The most important mechanism by which gram negative bacilli acquire chloramphenicol resistance is (a) Decreased permeability into the bacterial cell (b) Acquisition of a plasmid encoded ... bacterial ribosome for chloramphenicol (d) Switching over from ribosomal to mitochondrial protein synthesis

Last Answer : Ans: B

The most important mechanism by which tetracycline antibiotics exert antiimicrobial action is (a) They chelate Ca2+ ions and alter permeability of bacterial cell membrane (b) They bind to 30S ribosomes and inhibit bacterial protein synthesis (c) They bind to 50S ribosomes and interfere with translocation of the growing peptide chain in the bacteria (d) They interfere with DNA mediated RNA synthesis in bacteria

Description : The most important mechanism by which tetracycline antibiotics exert antiimicrobial action is (a) They chelate Ca2+ ions and alter permeability of bacterial cell membrane (b) They bind to 30S ribosomes ... peptide chain in the bacteria (d) They interfere with DNA mediated RNA synthesis in bacteria

Last Answer : Ans: B

Penicillins interfere with bacterial cell wall synthesis by (a) Inhibiting synthesis of N-acetyl muramic acid pentapeptide (b) Inhibiting conjugation between N-acetyl muramic acid and N-acetyl glucosamine (c) Inhibiting transpeptidases and carboxy peptidases which cross link the peptidoglycan residues (d) Counterfeiting for D-alanine in the bacterial cell wall

Description : Penicillins interfere with bacterial cell wall synthesis by (a) Inhibiting synthesis of N-acetyl muramic acid pentapeptide (b) Inhibiting conjugation between N-acetyl muramic acid and N-acetyl ... link the peptidoglycan residues (d) Counterfeiting for D-alanine in the bacterial cell wall

Last Answer : Ans: C

Which of the following cell organelles are not found in a bacterial cell? 1. Glyoxysomes 2. Lysosomes 3. Mitochondria 4. Ribosomes Select the correct answer using codes given below: (a) 1 and 4 (b) 2 and 4 (c) 1, 2 and 3 (d) 1, 2, 3 and 4

Description : Which of the following cell organelles are not found in a bacterial cell? 1. Glyoxysomes 2. Lysosomes 3. Mitochondria 4. Ribosomes Select the correct answer using codes given below: (a) 1 and 4 (b) 2 and 4 (c) 1, 2 and 3 (d) 1, 2, 3 and 4

Last Answer : Ans:(a)

Number of mitochondria in bacterial cell is - (1) one (2) two (3) many (4) zero

Description : Number of mitochondria in bacterial cell is - (1) one (2) two (3) many (4) zero

Last Answer : (4) zero Explanation: Bacteria are prokaryotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles. Cellular respiration, in prokaryotes, occurs within the cytoplasm or inner surfaces of the cell.

Bacterial cells do not have - (1) Cell wall (2) Plasma membrane (3) Ribosome (4) Mitochondria

Description : Bacterial cells do not have - (1) Cell wall (2) Plasma membrane (3) Ribosome (4) Mitochondria

Last Answer : (4) Mitochondria Explanation: Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which ... are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.

Production of a human protein in bacteria by genetic engineering is possible because (a) the human chromosome can replicate in bacterial cell (b) the mechanism of gene regulation is identical in humans and bacteria (c) bacterial cell can carry out the RNA splicing reactions (d) the genetic code is universal.

Description : Production of a human protein in bacteria by genetic engineering is possible because (a) the human chromosome can replicate in bacterial cell (b) the mechanism of gene regulation is identical in ... ) bacterial cell can carry out the RNA splicing reactions (d) the genetic code is universal.

Last Answer : (d) the genetic code is universal.

Which one of the following also acts as a catalyst in a bacterial cell? (a) 5S rRNA (b) snRNA (c) hnRNA (d) 23S rRNA

Description : Which one of the following also acts as a catalyst in a bacterial cell? (a) 5S rRNA (b) snRNA (c) hnRNA (d) 23S rRNA

Last Answer : (a) 5S rRNA

Which one of the following also acts as a catalyst in a bacterial cell? (a) 5S rRNA (b) snRNA (c) hnRNA (d) 23S rRNA

Description : Which one of the following also acts as a catalyst in a bacterial cell? (a) 5S rRNA (b) snRNA (c) hnRNA (d) 23S rRNA

Last Answer : 23S rRNA

Chromosomes in a bacterial cell can be 1 – 3 in number and (a) are always circular (b) are always linear (c) can be either circular or linear, but never both within the same cell (d) can be circular as well as linear within the same cell

Description : Chromosomes in a bacterial cell can be 1 – 3 in number and (a) are always circular (b) are always linear (c) can be either circular or linear, but never both within the same cell (d) can be circular as well as linear within the same cell

Last Answer : (a) are always circular

The term ‘glycocalyx’ is used for (a) a layer present between cell wall and membrane of bacteria (b) cell wall of bacteria (c) bacterial cell glyco-engineered to possess N-glycosylated proteins (d) a layer surrounding the cell wall of bacteria.

Description : The term ‘glycocalyx’ is used for (a) a layer present between cell wall and membrane of bacteria (b) cell wall of bacteria (c) bacterial cell glyco-engineered to possess N-glycosylated proteins (d) a layer surrounding the cell wall of bacteria.

Last Answer : (d) a layer surrounding the cell wall of bacteria.

Select the wrong statement. (a) Bacterial cell wall is made up of peptidoglycan. (b) Pili and fimbriae are mainly involved in motility of bacterial cells. (c) Cyanobacteria lack flagellated cells. (d) Mycoplasma is a wall-less microorganism.

Description : Select the wrong statement. (a) Bacterial cell wall is made up of peptidoglycan. (b) Pili and fimbriae are mainly involved in motility of bacterial cells. (c) Cyanobacteria lack flagellated cells. (d) Mycoplasma is a wall-less microorganism.

Last Answer : (b) Pili and fimbriae are mainly involved in motility of bacterial cells.

Which statement is correct for bacterial transduction? (a) Transfer of some genes from one bacteria to another bacteria through virus. (b) Transfer of genes from one bacteria to another bacteria by conjugation. (c) Bacteria obtained its DNA directly from mother cell. (d) Bacteria obtained DNA from other external source.

Description : Which statement is correct for bacterial transduction? (a) Transfer of some genes from one bacteria to another bacteria through virus. (b) Transfer of genes from one bacteria to another bacteria ... its DNA directly from mother cell. (d) Bacteria obtained DNA from other external source.

Last Answer : (a) Transfer of some genes from one bacteria to another bacteria through virus.

Which statement is correct for bacterial transduction? (a) Transfer of some genes from one bacteria to another bacteria through virus. (b) Transfer of genes from one bacteria to another bacteria by conjugation. (c) Bacteria obtained its DNA directly from mother cell. (d) Bacteria obtained DNA from other external source.

Description : Which statement is correct for bacterial transduction? (a) Transfer of some genes from one bacteria to another bacteria through virus. (b) Transfer of genes from one bacteria to another bacteria ... its DNA directly from mother cell. (d) Bacteria obtained DNA from other external source.

Last Answer : (a) Transfer of some genes from one bacteria to another bacteria through virus

Which of the following components provides sticky character to the bacterial cell? (a) Nuclear membrane (b) Plasma membrane (c) Glycocalyx (d) Cell wall

Description : Which of the following components provides sticky character to the bacterial cell? (a) Nuclear membrane (b) Plasma membrane (c) Glycocalyx (d) Cell wall

Last Answer : (c) Nostoc

Bacillus subtilis makes a good "bacterial factory" in genetic engineering because _____. a. it normally retains the products it makes b. it is not a human pathogen c. contains endotoxins in it's cell wall d. traditionally ferments sugars

Description : Bacillus subtilis makes a good "bacterial factory" in genetic engineering because _____. a. it normally retains the products it makes b. it is not a human pathogen c. contains endotoxins in it's cell wall d. traditionally ferments sugars

Last Answer : b. it is not a human pathogen

The sulfonamides interfere with bacterial metabolism by a. blocking cell wall synthesis. b. disrupting folic acid metabolism. c. reacting with bacterial cell membranes. d. inhibiting DNA replication.

Description : The sulfonamides interfere with bacterial metabolism by a. blocking cell wall synthesis. b. disrupting folic acid metabolism. c. reacting with bacterial cell membranes. d. inhibiting DNA replication.

Last Answer : b. disrupting folic acid metabolism.

Vancomycin inhibits _____________ synthesis. a. protein b. DNA c. bacterial cell wall d. RNA

Description : Vancomycin inhibits _____________ synthesis. a. protein b. DNA c. bacterial cell wall d. RNA

Last Answer : c. bacterial cell wall

Which one of the following is not an antigen? a. A toxin b. A virus c. A bacterial cell d. All (A-C) are antigens

Description : Which one of the following is not an antigen? a. A toxin b. A virus c. A bacterial cell d. All (A-C) are antigens

Last Answer : d. All (A-C) are antigens

Competence refers to a bacterial cell's ability to a. Take Up DNA Fragments From The Environment. b. Be Infected By A Transducing Phage. c. Produce A Protein Product From An Engineered Gene. d. Undergo Conjugation With An F+ Cell.

Description : Competence refers to a bacterial cell's ability to a. Take Up DNA Fragments From The Environment. b. Be Infected By A Transducing Phage. c. Produce A Protein Product From An Engineered Gene. d. Undergo Conjugation With An F+ Cell.

Last Answer : a. Take Up DNA Fragments From The Environment.

A bacterial cell that is transformed _____. a. Cannot Form A Conjugation Pilus. b. Has Undergone A Frameshift Mutation. c. Has Acquired Dna From The Environment. d. Will Probably Die Within 24 Hours.

Description : A bacterial cell that is transformed _____. a. Cannot Form A Conjugation Pilus. b. Has Undergone A Frameshift Mutation. c. Has Acquired Dna From The Environment. d. Will Probably Die Within 24 Hours.

Last Answer : c. Has Acquired Dna From The Environment.

Being compartmentalized, bacterial RNA polymerases are localized in the and ribosomes are founda. Nucleoid; At The Nucleoid Periphery b. Cytosol; In The Cytosol c. Cytosol; At The Cell Poles d. Nucleoid; In The Nucleoid

Description : Being compartmentalized, bacterial RNA polymerases are localized in the and ribosomes are found a. Nucleoid; At The Nucleoid Periphery b. Cytosol; In The Cytosol c. Cytosol; At The Cell Poles d. Nucleoid; In The Nucleoid

Last Answer : a. Nucleoid; At The Nucleoid Periphery

Quantitative measurement of bacterial growth can be carried out by measuring A-.cell count B- .cell mass C- .cell activity D- .all of these

Description : Quantitative measurement of bacterial growth can be carried out by measuring A-.cell count B- .cell mass C- .cell activity D- .all of these

Last Answer : .all of these

What is term used for a bacterial cell that is able to take up naked DNA? A- Complementary B- Liable C- Competent D- Infected

Description : What is term used for a bacterial cell that is able to take up naked DNA? A- Complementary B- Liable C- Competent D- Infected

Last Answer : Competent

Which one of the following statements does NOT apply to bacterial reproduction? a. A fission ring apparatus is present. b. Septum formation occurs. c. A spindle apparatus is used. d. Symmetrical cell division occurs.

Description : Which one of the following statements does NOT apply to bacterial reproduction? a. A fission ring apparatus is present. b. Septum formation occurs. c. A spindle apparatus is used. d. Symmetrical cell division occurs.

Last Answer : c. A spindle apparatus is used.

The bacterial cell is capable of a. Spatial separation of metabolic processes. b. Carrying out complex metabolic processes. c. Sub compartmentalizing biochemical processes. d. All the above (A—C) are correct.

Description : The bacterial cell is capable of a. Spatial separation of metabolic processes. b. Carrying out complex metabolic processes. c. Sub compartmentalizing biochemical processes. d. All the above (A—C) are correct.

Last Answer : b. Carrying out complex metabolic processes.

The bacterial cytoskeleton a. transport vesicle b. helps determine cell shape c. Is organized identical to its eukaryotic counterpart. d. Centers the nucleoid.

Description : The bacterial cytoskeleton a. transport vesicle b. helps determine cell shape c. Is organized identical to its eukaryotic counterpart. d. Centers the nucleoid.

Last Answer : b. helps determine cell shape