Homework Answers
Bacteria and Archaeans:
- Do not have a true nucleus
-Inhabits nearly all of Earth's environments
(Bacteria and archaea are the single-celled, smaller than eukaryotic cells and are categorised under the category of prokaryotes. They have no nucleus and do not have organelles. Prokaryotes dominate the Earth and live almost everywhere, even inside of our bodies. All prokaryotic cells are encased by a cell wall and have a capsule or slime layer made of polysaccharide. They have specialised structures like flagella, fimbriae and pili for locomotion. They lack the true nucleus which means that the genetic material is not enclosed in a membrane but is freely floating single circular chromosome and smaller pieces of circular DNA called plasmids)
Both:
- Have a cell membrane
(Both prokaryotes and eukaryotes have cell membrane surrounding the cellular components. Both have a phospholipid layer in their cell/plasma membrane. Bacteria and eukaryotes have a bi-lipid layer whereas some archaeal cells have mono-lipid layer instead of the bi-lipid layer)
Eukaryotes:
- Have a true nucleus
- Have a complex structure with many types of organelles
(Eukaryotic cells are bigger than the prokaryotic cells and they have a true nucleus because the nucleus houses the cell's DNA surrounded by a membrane. This nucleus directs the synthesis of proteins. Eukaryotic cells have distinct organisation and compartmentalisation of membrane-bound organelles which are the specialized structure found inside cells to carry out a specific life process. Example, Ribosomes, Golgi apparatus, Endoplasmic Reticulum, vacuole etc.)
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Features • Do not have a true nucleus • Inhabit nearly all of Earth's environments •...
Cells with a relatively simple cell morphology that do not have a true membrane-delimited nucleus are...
Cells with a relatively simple cell morphology that do not have a true membrane-delimited nucleus are called Multiple Choice prokaryotes 0 eukaryotes 0 0 urkaryotes nokaryotes 0 The ribosomal RNA studies that led to the division of prokaryotic organisms into the Bacteria and the Archaea were begun by Multiple Choice 0 0 Needham 0
4. Development of organelles Aa Aa 3 Modern eukaryotic cells are very complex and have many...
4. Development of organelles Aa Aa 3 Modern eukaryotic cells are very complex and have many features that allow them to function efficiently. These complexities took a very, very long time to evolve and likely progressed as a series of small improvements that were naturally selected. For example, modern eukaryotic cells have internal membranes surrounding their organelles and the nucleus. This arrangement likely arose when the cellular membranes of some ancient bacterial cells accidentally folded to become internal membranes. Which...
Which of the following statements is not true regarding the differences between bacteria, archaea, and eukaryotes?...
Which of the following statements is not true regarding the differences between bacteria, archaea, and eukaryotes? a) Flagella are found on bacteria, archaea and eukaryotes yet they all vary in b Bacteria and archaea have circular chromosomes in a nucleoid region ) The cell walls of bacteria and archaea both contain the complex d) Ribosomal RNA sequencing revealed that the structure of the ribosomal structure whereas eukaryotes have linear chromosomes that are enclosed in a nuclear membrane macromolecule peptidoglycan, whereas...
Complete the following chart concerning bacteria, archaea and eukaryotic cells. Bacteria Archaea Eukarya True nucleus: No...
Complete the following chart concerning bacteria, archaea and eukaryotic cells. Bacteria Archaea Eukarya True nucleus: No nucleus No nucleus Has a nucleus Some have a nucleus Pasilas Plasmids: Plasmids are common Plasmids are uncommon Plasmids are common No plasmids Organelles (mitochondria, ER, golgi): No organelles Many organelles Few organelles No organelles Peptidoglycan cell walls: No peptidoglycan Peptidoglycan present No peptidoglycan Some peptidoglycan present
55. As they flow over rotten logs as a fluid s heet, slime molds appear to...
55. As they flow over rotten logs as a fluid s heet, slime molds appear to lack any partitioning isto Individual cells; however, slime molds do become The surface of some parasitic n material that contains many nuclel and cell These tissues consume food and produce wastes. In light of the cell theory that "all living things are composed of cells," then a) these tissues are not living because they are not cellular b) these tissues are obviously a bridge...
Bio 147 Class Assignment Name 5 points 1. What could be the probable name of this...
Bio 147 Class Assignment Name 5 points 1. What could be the probable name of this bacteria? 2. Why are Mycoplasma tough to be treated with antibiotics? 3. Viruses can be killed with Antibiotics? True or false 4. A structure around the bacteria that blocks phagocytosis a. Cell wall b. capsule c. cell membrane 5. One way eukaryotic cell and prokaryotic cells are ALIKE is : A. Both cell types have a cell wall B. Both cell types include human...
All life is comprised of cells. All of the following are true regarding the cells that...
All life is comprised of cells. All of the following are true regarding the cells that make up living organisms except one. Select the exception Multiple Choice Superficially, the cells of Archaea and Bacteria are quite similar. At a molecular level, however, these cells are very different All animal cells are eukaryotic Members of the Archaea are the only organisms that lack a membrane bound nucleus Members of the Eukarya are composed of cells that have membrane-bound organelles and DNA...
QUESTION2 Which of the following statements is TRUE? O DNADNA hybrids and RNADNA hybrids are always...
QUESTION2 Which of the following statements is TRUE? O DNADNA hybrids and RNADNA hybrids are always antiparallel O DNA is replicated using the template strand as the template but RNA is transcribed using the sense (or coding) strand as the template. O Both DNA and RNA polymerization require a primer O Introns get spliced out of DNA and out of pre-mRNA QUESTION 3 0. Which of the following statements is FALSE? O Only Eukaryote genes have an A/T rich core...
Which of the following traits do archaeans and bacteria share? A. lack of a nuclear envelope...
Which of the following traits do archaeans and bacteria share? A. lack of a nuclear envelope and structure of cellular membrane B. structure of the plasma membrane OC. lack of a nuclear envelope and presence of plasma membrane OD. composition of the cell wall and lack of a nuclear envelope E. presence of plasma membrane and composition of the cell wall question 2 2 po Which of these structures physically move away from the parent gymnosperm? Choose all that A....
true or false. at physiological PH, nearly all amino acids have overall positive charge True False...
true or false. at physiological PH, nearly all amino acids
have overall positive charge
True False 1) At physiological pH, nearly all amino acids have an overall positive charge. 2) The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly. tide 3) The peptide sequence Gly-Gly-Gly gives the primary structure of a tripeptide. 4) The u-helix is a secondary structure. 5) The triple helix of collagen is a tertiary structure.
Cells with a relatively simple cell morphology that do not have a true membrane-delimited nucleus are called Multiple Choice prokaryotes 0 eukaryotes 0 0 urkaryotes nokaryotes 0 The ribosomal RNA studies that led to the division of prokaryotic organisms into the Bacteria and the Archaea were begun by Multiple Choice 0 0 Needham 0
4. Development of organelles Aa Aa 3 Modern eukaryotic cells are very complex and have many features that allow them to function efficiently. These complexities took a very, very long time to evolve and likely progressed as a series of small improvements that were naturally selected. For example, modern eukaryotic cells have internal membranes surrounding their organelles and the nucleus. This arrangement likely arose when the cellular membranes of some ancient bacterial cells accidentally folded to become internal membranes. Which...
Which of the following statements is not true regarding the differences between bacteria, archaea, and eukaryotes? a) Flagella are found on bacteria, archaea and eukaryotes yet they all vary in b Bacteria and archaea have circular chromosomes in a nucleoid region ) The cell walls of bacteria and archaea both contain the complex d) Ribosomal RNA sequencing revealed that the structure of the ribosomal structure whereas eukaryotes have linear chromosomes that are enclosed in a nuclear membrane macromolecule peptidoglycan, whereas...
Complete the following chart concerning bacteria, archaea and eukaryotic cells. Bacteria Archaea Eukarya True nucleus: No nucleus No nucleus Has a nucleus Some have a nucleus Pasilas Plasmids: Plasmids are common Plasmids are uncommon Plasmids are common No plasmids Organelles (mitochondria, ER, golgi): No organelles Many organelles Few organelles No organelles Peptidoglycan cell walls: No peptidoglycan Peptidoglycan present No peptidoglycan Some peptidoglycan present
55. As they flow over rotten logs as a fluid s heet, slime molds appear to lack any partitioning isto Individual cells; however, slime molds do become The surface of some parasitic n material that contains many nuclel and cell These tissues consume food and produce wastes. In light of the cell theory that "all living things are composed of cells," then a) these tissues are not living because they are not cellular b) these tissues are obviously a bridge...
Bio 147 Class Assignment Name 5 points 1. What could be the probable name of this bacteria? 2. Why are Mycoplasma tough to be treated with antibiotics? 3. Viruses can be killed with Antibiotics? True or false 4. A structure around the bacteria that blocks phagocytosis a. Cell wall b. capsule c. cell membrane 5. One way eukaryotic cell and prokaryotic cells are ALIKE is : A. Both cell types have a cell wall B. Both cell types include human...
All life is comprised of cells. All of the following are true regarding the cells that make up living organisms except one. Select the exception Multiple Choice Superficially, the cells of Archaea and Bacteria are quite similar. At a molecular level, however, these cells are very different All animal cells are eukaryotic Members of the Archaea are the only organisms that lack a membrane bound nucleus Members of the Eukarya are composed of cells that have membrane-bound organelles and DNA...
QUESTION2 Which of the following statements is TRUE? O DNADNA hybrids and RNADNA hybrids are always antiparallel O DNA is replicated using the template strand as the template but RNA is transcribed using the sense (or coding) strand as the template. O Both DNA and RNA polymerization require a primer O Introns get spliced out of DNA and out of pre-mRNA QUESTION 3 0. Which of the following statements is FALSE? O Only Eukaryote genes have an A/T rich core...
Which of the following traits do archaeans and bacteria share? A. lack of a nuclear envelope and structure of cellular membrane B. structure of the plasma membrane OC. lack of a nuclear envelope and presence of plasma membrane OD. composition of the cell wall and lack of a nuclear envelope E. presence of plasma membrane and composition of the cell wall question 2 2 po Which of these structures physically move away from the parent gymnosperm? Choose all that A....
true or false. at physiological PH, nearly all amino acids
have overall positive charge
True False 1) At physiological pH, nearly all amino acids have an overall positive charge. 2) The dipeptide abbreviated as Gly-Lys is the same as the dipeptide abbreviated as Lys-Gly. tide 3) The peptide sequence Gly-Gly-Gly gives the primary structure of a tripeptide. 4) The u-helix is a secondary structure. 5) The triple helix of collagen is a tertiary structure.
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