Description : The bacterium Deinococcus radiodurans has been of interest to molecular biologists because a. it has the smallest known bacterial genome. b. it is a "living fossil" linking the Bacteria and Archaea. c. it has the largest known bacterial genome. d. it is very resistant to radiation damage.
Last Answer : d. it is very resistant to radiation damage.
Description : This group of protozoa has a single mitochondrion with a mass of DNA. a. Kinetoplastids b. Ciliates c. Apicomplexans d. Diplomonads
Last Answer : a. Kinetoplastids
Description : Which bacterium is responsible for tuberculosis, and what are the characteristics of the organism?
Last Answer : Tuberculosis is caused by a slender rod known as Mycobacterium tuberculosis. This slow- growing rod is neither Gram- positive nor Gram- negative; rather, it is acid- fast. When stained with ... fast characteristic is due to the presence of a very thick cell wall containing mycolic acid.
Description : During the process of lysogeny _____. a. Phage DNA Integrates Into The Bacterial Chromosome. b. A Bacterium Acquires DNA From The External Environment. c. Competent Cells Receive Plasmids. d. New Phage Particles Are Assembled In The Host Bacterium.
Last Answer : a. Phage DNA Integrates Into The Bacterial Chromosome.
Description : The term used for acquisition of naked DNA from its environment and its incorporation in their genome by a bacterium is A.transformation B.lysogenic conversion C.conjugation D.transduction
Last Answer : A.transformation
Description : .Which is most likely to be exposed on the surface of a gram-negative bacterium? A.Pore protein (porin) B.Protein involved in energy generation C.Lipoteichoic acid D.Phospholipids
Last Answer : A.Pore protein (porin)
Description : The PCR/sequencing approach to rRNA is most likely to give information about A.the species to which the bacteria are most closely related B.morphology of the bacterium C.the type of energy metabolism the bacterium has D.whether the bacterium is motile
Last Answer : A.the species to which the bacteria are most closely related
Description : Which of the following may be most likely to be missing from a gram-positive bacterium? A.Penicillin binding protein B.Peptidoglycan C.Lipopolysaccharide D.Phospholipid bilayer membrane
Last Answer : C.Lipopolysaccharide
Description : During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as A- eclipse period B- rise period C- latent period D- burst size
Last Answer : eclipse period
Description : A quorum sensing system A- .detects a signal from the external environment B- B.senses a compound produced by the bacterium itself C- consists of a sensor component that phosphorylates a regulatory protein D- .controls the activity of ribosomes directly
Last Answer : B.senses a compound produced by the bacterium itself
Description : The term used for acquisition of naked DNA from its environment and its incorporation in theirgenome by a bacterium is A- transformation B- lysogenic conversion C- conjugation D- .transduction
Last Answer : transformation
Description : Why the bacterium Treponemapallidum is difficult to culture? A-.Because it requires a great deal of water to reproduce B- .Because it is unable to use carbohydrates as an energy source ... TCA cycle and oxidative phosphorylation D- Because it requires extremely low temperature at which water freezes
Last Answer : Because it lacks the genes needed for TCA cycle and oxidative phosphorylation
Description : To select cholera-causing bacterium, Vibrio cholerae, the pH of the medium is maintained at apH of A- 8.5 B-8.90 C-6.79 D- 3.5
Last Answer : 8.5
Description : Which of the following is exposed on the outer surface of a gram-negative bacterium?A- O-antigen of lipopolysaccharide (LPS) B- Polysaccharide portion of lipoteichoic acid (LTA) C- Braun lipoprotein D- .Electron transport system components
Last Answer : O-antigen of lipopolysaccharide (LPS)
Description : Which is most likely to be exposed on the surface of a gram-negative bacterium? A- Pore protein (porin) B- Protein involved in energy generation C- .Lipoteichoic acid D- Phospholipids
Last Answer : Pore protein (porin)
Description : Which is the smallest bacterium ?
Last Answer : answer : dialister
Description : The smallest living cell is that of a (a) bacterium (b) bread mold (c) mycoplasma (d) virus
Last Answer : Ans:(c)
Description : Antibiotics will not work against _____ diseases because they lack the structures and metabolic machinery with which antibiotics interfere. a. viral b. bacterial c. fungal d. protozoan
Last Answer : a. viral
Description : Both the ascus and the basidium a. Are formed by fungi in the mitosporic fungi. b. Are involved in coenocytic formation by fungi. c. Are diploid structures. d. Are produced during the sexual stage of fungal reproduction.
Last Answer : d. Are produced during the sexual stage of fungal reproduction.
Description : Why are slime molds considered to resemble plants? A.They can photosynthesize B.Theyhave cell walls composed largely of cellulose C.They form a threadlike structure D.They form structures that resemble leaves
Last Answer : B.Theyhave cell walls composed largely of cellulose
Last Answer : Theyhave cell walls composed largely of cellulose
Description : Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand
Last Answer : structures in DNA caused by inverted repeats
Description : Why are slime molds considered to resemble plants? A- They can photosynthesize B- They have cell walls composed largely of cellulose C- They form a threadlike structure D- They form structures that resemble leaves
Last Answer : They have cell walls composed largely of cellulose
Description : When nutrients are limiting, some bacterial species can form resistant structures called _____. a. endospores b. cysts c. seeds d. capsules
Last Answer : a. endospores
Description : The _____ microscope would be used to view cell structures within ultrathin sections of cells. a. scanning electron b. transmission electron c. bright-field d. dark-field
Last Answer : b. transmission electron
Description : In order to become a/an ______, an atom of chlorine must ______ an electron. a. Ion; Gain b. Molecule; Lose c. Ion; Lose d. Molecule; Gain
Last Answer : a. Ion; Gain
Description : Severe combined immunodeficiency disease refers to a condition wherein a patient a. Cannot produce T and B cells. b. Interferon. c. Antigen-presenting cells. d. Hydrogen peroxide in phagocytes
Last Answer : a. Cannot produce T and B cells.
Description : In fermentation reactions occurring in yeast, two products of metabolism are ______ and ______. a. Acid; Hydrogen Gas b. Hydrogen Gas; Sucrose c. Ethyl Alcohol; Methane d. Carbon Dioxide; Ethyl Alcohol
Last Answer : a. Acid; Hydrogen Gas
Description : The butyric acid type of fermentation in acid or medium acid foods, with swelling of the containerby the carbon dioxide and hydrogen gas is caused by A.C. butyricum B.C. pasteurianum C.both (a) and (b) D.C. sporogenes
Last Answer : C.both (a) and (b)
Description : The acquisition energy by glucose fermentation requires A.substrate-level phosphorylation B.electron transport of electrons from NADH C.long-chain fatty acid oxidation D.the enzyme formic-hydrogen lyase
Last Answer : A.substrate-level phosphorylation
Description : Most of the energy in aerobic respiration of glucose is captured by A- substrate-level phosphorylation B- electron transport of electrons from NADH C- long-chain fatty acid oxidation D- the enzyme formic-hydrogen lyase
Last Answer : electron transport of electrons from NADH
Description : Facultative anaerobes can live with or without _____ gas. a. carbon dioxide b. hydrogen c. nitrogen d. oxygen
Last Answer : d. oxygen
Description : What is the weak bond holding the nucleic acids together in DNA? a. ionic bonds b. covalent bonds bonds c. polar bond d. hydrogen bond
Last Answer : d. hydrogen bond
Description : An inert element has electron shells that a. Overlap The Shells Of Other Atoms. b. Are Completely Filled With Electrons. c. Yield Hydrogen Ions. d. Form Covalent Bonds.
Last Answer : b. Are Completely Filled With Electrons.
Description : The bond is a weak bond that can exist between poles of adjacent molecules. a. hydrogen b. ionic c. polar covalent d. non polar covalent
Last Answer : d. non polar covalent
Description : For _______ bonding, one or more electrons are transferred between atoms. a. hydrogen b. ionic c. peptide d. covalent
Last Answer : b. ionic
Description : Put the following structures in order from smallest to biggest, Chromosome, Genome, Nucleotide Base, Codon, Gene, Cell Nucleus?
Last Answer : The order is nitrogenous base, nucleotide, codon, gene, chromosome, nucleus, and cell. :)
Description : (1) they contain free electrons Explanation: Metals typically consist of closepacked atoms, meaning that the atoms are arranged like closely packed spheres. Two packing motifs are common, one ... surrounded by six neighboring atoms. Several metals adopt both structures, depending on the temperature.
Last Answer : Helium gas is filled in ballons because (1) its atomic number is 2 (2) it is lighter than air (3) it is one of the constitutents of water (4) it is a noble gas
Description : A compound which contains two ring structures havi one common carbon atom is known as a: w) spiro-compound x) nonpolar compound y) interstitial compound z) inner compound
Last Answer : ANSWER: W -- SPIRO-COMPOUND
Description : The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), ( C ) and (D). Select the part correctly matched with i
Last Answer : The figure below shows the structure of a mitochondrion with its four parts labelled (A), ... - possess single circular DNA molecule and ribosomes
Description : Could you find free living mitochondrion today why or why not?
Last Answer : Feel Free to Answer
Description : What structure is most likely necessary for a mitochondrion to produce new molecules?
Description : A mitochondrion cannot produce new molecules. Which structure is most likely not functioning properly?
Last Answer : Hydrogen pump (APEX)
Description : Out of the total enzymes present in a cell, a mitochondrion alone has (A) 4% (B) 70% (C) 95% (D) 50%
Last Answer : Answer : B
Description : Degradations of Hb takes place in (A) Mitochondrion (B) Erythrocytes (C) Cytosol of cell (D) R.E. cells
Last Answer : Answer : D
Description : The most active site of protein synthesis is the (A) Nucleus (B) Ribosome (C) Mitochondrion (D) Cell sap
Last Answer : B
Description : The organelle that make ATP is (a) Microbody (b) Nucleus (c) Mitochondrion (d) Ribosome
Description : Which one of the following Is also called the ‘powerplants’ of the cell? (1) Golgi body (2) Mitochondrion (3) Ribosome (4) Lysosome
Last Answer : (2) Mitochondrion Explanation: Mitochondria through the process of aerobic respiration, in eukaryotic cells produce ATP (energy currency of the cell). Hence, it is known as ‘powerplant of the cell'.