Description : Which one of the following is NOT found in bacterial cells? a. Ribosomes b. DNA c. Mitochondria d. Cytoplasm
Last Answer : c. Mitochondria
Description : Which one of the following statements about the nucleoid is NOT true? a. It contains a DNA chromosome. b. It represents a nonmembranous subcompartment. c. It represents an area devoid of ribosomes. d. It contains nonessential genetic information.
Last Answer : d. It contains nonessential genetic information.
Description : Where is ATP produced in prokaryotic cells? a. In The Mitochondria b. In The Chloroplast c. On The Cell Membrane d. On The Ribosomes
Last Answer : b. In The Chloroplast
Description : Which of the following is not true for eukaryotic cells? A- Nucleus is bounded by nuclear membrane B- Chromosomes contain histones C- Chloroplasts and mitochondria contains 70S ribosomes D- Gas vacuoles are present
Last Answer : Gas vacuoles are present
Description : What is evidence for the endosymbiotic theory? a. Ribosomes are the same size in eukaryotes and prokaryotes b. Organelles like mitochondria and cholorplasts have their own dna and ribosomes c. Flagella are the same in both types of cells d. A-C are correct
Last Answer : b. Organelles like mitochondria and cholorplasts have their own dna and ribosomes
Description : Where does protein synthesis take place in all cells? a. mitochondria b. cell membranes c. ribosomes d. Golgi apparatus
Last Answer : c. ribosomes
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)
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
Description : Which of the following structure is absent in eukaryotic cells? A- Mitochondria B- Chloroplasts C- Golgi structure D- Mesosome
Last Answer : Mesosome
Description : Which one of the following is NOT true of exotoxins? a. They are proteins. b. They are part of cell wall structure. c. They are released from live bacterial cells. d. They trigger antibody production.
Last Answer : d. They trigger antibody production.
Description : Flagella are a. Made of carbohydrate and lipid. b. Found on all bacterial cells. c. Contain dextran fiber d. Important for chemo taxis.
Last Answer : d. Important for chemo taxis.
Description : In eukaryotic cells, ribosomes are A.70S B.60S C.80S D.Not specific
Last Answer : C.80S
Description : In eukaryotic cells, ribosomes are A- 70S B- 60S C- 80S D- Not specific
Last Answer : 80S
Description : The power house of energy in cells is (a) Golgi bodies (b) Mitochondria (c) Ribosomes (d) Endoplasmic reticulum
Last Answer : Ans:(b)
Description : Photosynthesis takes place inside plant cells in ______. (1) Ribosomes (2) Chloroplasts (3) Nucleus (4) Mitochondria
Last Answer : (2) Chloroplasts Explanation: In plants, the process of photosynthesis takes place in the mesophyll of the leaves, inside the chloroplasts.
Description : All the following are basic properties of cells except A- cells have nuclei and mitochondria B- cells have a genetic programme and the means to use it C- .cells are capable of producing more of themselves D-.cells are able to respond to stimuli
Last Answer : cells have nuclei and mitochondria
Description : Which of the following statements supports the cell theory? a. all living things are made of cells b. all living things have a chromosome in the nucleus c. all living things have cellular metabolism in the mitochondria d. A-C are correct
Last Answer : a. all living things are made of cells
Description : ------------ is mainly present in prokaryotic cells A Mitochondria B ER C Golgi apparatus D Mesosomes
Last Answer : D Mesosomes
Description : A healthy person can be diagnosed as having a infection with the multiplication of bacterial cells in the blood. a. Primary; bacteremia b. Primary; vermeil c. Primary; septicemia d. Secondary; parasitemia
Last Answer : c. Primary; septicemia
Description : The skin is a. Dominated By Gram-Negative Bacterial Cells. b. Free Of Bacterial Cells. c. Without A Microbiota. d. Dominated By Gram-Positive Bacterial Cells.
Last Answer : d. Dominated By Gram-Positive Bacterial Cells.
Description : Transformed bacterial cells may display enhanced drug resistances from the acquisition of _____. a. F factors b. M factors c. R factors d. S factors
Last Answer : c. R factors
Description : Which of the following is NOT a type of horizontal gene transfer between bacterial cells? a. transformation b. conjugation c. transduction d. translation
Last Answer : d. translation
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.
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 : Transposons are of particular significance because they a. often contain genes for antibiotic resistance. b. inhibit the effects of overlapping genes. c. come in pairs and often are associated with viruses. d. regulate gene transcription in bacterial cells.
Last Answer : a. often contain genes for antibiotic resistance.
Description : The promoter on an expression vector used to overproduce proteins in bacteria is A.a bacterial promoter B.expressed both in bacteria and mammalian cells C.not a regulated promoter D.the natural promoter of the gene being cloned
Last Answer : A.a bacterial promoter
Description : Bacterial cells susceptible to penicillium can be protected from destruction if the medium in which they are exposed is of A- high osmotic pressure B- low osmotic pressure C- moderate osmotic pressure D- high surface tension
Last Answer : high osmotic pressure
Description : The first step in infection of a host bacterial cells by a phage is A- adsorption B- absorption C- penetration D- replication
Last Answer : adsorption
Description : Treatment with bacterial endotoxins results blast formation in A- .B cells B- T cells C- Monocytes D- none of these
Last Answer : B cells
Description : During the stationary phase of bacterial growth, the population of living cells is _____ the population of dying cells. a. greater than b. smaller than c. equal to d. increasing faster than
Last Answer : c. equal to
Description : Reproduction in bacterial cells occurs by the sequence of events known as _____. a. mitosis b. binary fission c. selfing d. budding
Last Answer : b. binary fission
Description : Spherical bacterial cells in chains would be a referred to as a _______ arrangement. a. Vibrio b. Streptococcus c. Staphylococcus d. Tetrad
Last Answer : b. Streptococcus
Description : Which of the following do some bacterial cells use for motility? a. flagella b. cillia c. fimbriae d. pseudopodia
Last Answer : a. flagella
Description : Bacterial cells in biofilms can communicate with each other through a. osmosis b. quorum sensing c. diffusion d. enzymes
Last Answer : b. quorum sensing
Description : Before bacterial cells are simple stained and observed with the light microscope, they must be a. Smeared on a slide. b. Heat fixed. c. Air dried. d. All the above (A—C) are correct.
Last Answer : d. All the above (A—C) are correct.
Description : Most bacterial cells are measured using what metric system of length? a. Millimeters (mm) b. Micrometers (µm) c. Nanometers (nm) d. Centimeters (cm)
Last Answer : b. Micrometers (µm)
Description : Who was the first person to see bacterial cells with the microscope? a. Pasteur b. Koch c. Leeuwenhoek d. Hooke
Last Answer : c. Leeuwenhoek
Description : Cell Organelle found only in plants are— (A) Mitochondria (B) Golgi complex (C) Ribosomes (D) Plastids
Last Answer : (D) Plastids
Description : Thermococcus, Methanococcus and Methano- bacterium exemplify (a) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria (b) bacteria that ... that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Last Answer : (c) archaebacteria that contain protein homologous to eukaryotic core histones
Description : Which one of the following is NOT found in the ciliates? a. A contractile vacuoLe b. Macronuclei and micronucLei c. A compLex of organelles in the tip d. Mitochondria
Last Answer : d. Mitochondria
Description : All of the following are found in prokaryotes and eukaryotes, except a. acell (plasma) membrane b. mitochondria c. cytoplasm d. ribosome
Last Answer : b. mitochondria
Description : Ribosomes similar to those of bacterial found in (A) Plant nucei (B) Cardiac muscle cytoplasm (C) Liver endoplasmic reticulum (D) Neuronal cytoplasm
Last Answer : Answer : A
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.
Description : Bacterial cells do not have (1) Cell wall (2) Plasma membrane (3) Ribosome (4) Mitochondria
Last Answer : Mitochondria
Description : Ribosomes match up the ______ of the mRNA and the ______ of the tRNAs. a. codons; anticodons b. introns; exons c. anticodons; codons d. genes; anticodons
Last Answer : a. codons; anticodons
Description : Multiple ribosomes working together on one mRNA are called a. polysomes b. multisomes c. polymerases d. A-C are correct
Last Answer : a. polysomes
Description : The translation of a mRNA by multiple ribosomes is called formation. a. Okazaki b. Polysome c. Plasmid d. Transposon
Last Answer : b. Polysome
Description : At a chromosome replication fork, the lagging strand consists of__ That is joined by___. a. RNA sequences; DNA ligase b. Okazaki Fragments; RNA Polymerase c. RNA sequences; ribosomes d. Okazaki fragments; DNA ligase
Last Answer : d. Okazaki fragments; DNA ligase
Description : Which of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm
Description : Which of the following act as the blueprint or template for the process of protein synthesis that takes place on ribosomes? A.rRNA B.DNA C.tRNA D.mRNA
Last Answer : mRNA