Actin cytoskeleton - Study guides, Revision notes & Summaries

All of the following statement about plants cells are true EXCEPT one. Which one is the EXCEPTION? A. Most of the cytoplasmic volume is occupied by a single vacuole B. Plant cell walls contain cellulose C. Plant cells possesses a cell wall but not a cell membrane D. Adjacent plant cells contain channels allowing for intercellular communication E. Plant cells have mitochondria - Answer-C - plant cells DO have a plasma membrane 2. Why are intracellular binding steroidal hormones slow...

Which of these conditions would NOT affect the ability of Streptococcus mutans to attach to teeth? - The absence of Actinomyces, a bacterium that can be part of dental plaque cell wall components - M proteins: mediates attachment and resists phagocytosis (strep. pyogenes) Opa protein: assist attachment and recept mediated endocytosis, inhibs helper t cells (n. gonorrhoeae) Mycolic acid: Waxy, resists digestion (mycobacterium TB) Pathogenicity - The ability to cause disease Virulence - the...

BIO 353 Final Exam Review Questions And Answers 2024/2025 Updates Which one (1) of the following is NOT considered part of the cytoplasm? ANS Nucleus Antifungal drugs such as Lamisil and Amphotericin B destroy fungal cells by targeting which one of the following molecules found in fungal, but not animal, cell membranes? ANS Ergosterol The DNA of a prokaryotic cell is located primarily in the _______________. ANS nucleoid The water temperature of streams that flow from glaciers in th...

Not very many proteins in the eukaryotic cytoplasmic membrane. Where did they go? correct answers They are still in the membrane and they are still busy, but most of the proteins went to the mitochondrial membrane in eukaryotes. Cellulose and Chitin correct answers Use specific b-1,4-glycosidic bonds between sugars provides strength and rigidity. In algae Fungi - Cell Wall correct answers You have a NAG in chitin for cell walls in fungi. The cell wall is all NAGs Cytoskeleton Function c...

Transfer tRNA correct answers What completes translation Adaptor molecules between mRNA & amino acids in protein synthesis - ensures correct aa Transcribed as a group in long pre-mRNAs Transcribed by polymerase II ~ 70-80 nucleotides, Clover leaf/ L structure Cleaved post transcription into individual tRNAs 5' end cleaved by RNaseP 3' end cleaved by RNase with CCA sequence Centromere correct answers Specialized region of the chromosome Attaches sister chromatids Critical role in ...

BIO 353 Exam 4 Study Guide Verified Questions And Answers define cytoskeleton ANS a network of filaments or tubes composed of protein subunits and associated proteins what are the three structural elements that constitute the cytoskeleton ANS intermediate filaments, microtubules, and actin filaments what are the primary functions of the cytoskeleton ANS cell motility, intracellular motility, cytoplasmic order, and cell and tissue shape and support what are the characteristics of int...

ASU BIO 181: EXAM 2 QUESTIONS AND ANSWERS ALREADY PASSED 90% of absorption in the intestine occurs where? The jejunum and the ileum A bacterium coated by antibodies is a signal that a macrophage should endocytose (eat) it true Adhering junctions are based on two different types of cytoskeleton filament systems. Name those systems. Actin Filament System Intermediate Filament System Any cell can present an antigen on a class I major histocompatibility complex (MHC) protein. true...

NUR-631 Final Exam Study Guide 2023 (Questions With Complete Solutions Graded A+) fibers arise from nasal olfactory epithelium and form synapses with olfactory bulbs that transmit impulses to temporal lobe Hypoglossal nerve - ANSWER *XII* -stick out tongue -motor fibers to muscles of tongue and sensory impulse from tongue to brain -fibers arise from medulla and exit from skull and extend to tongue trigeminal nerve - ANSWER *V* -sensations of pain, touch, temperature, corneal reflex, clenc...

What are intermediate filaments? CORRECT ANSWER Protein fibers that are wound together and is responsible for giving skin cells their scaffolding and rigidity Why are they called intermediate filaments? CORRECT ANSWER They are located in between the other two types of cytoskeletal elements (actin and microtubules) What characteristics do they endow cells with? CORRECT ANSWER Give cells a sturdy and unbendable shape Intermediate filaments are classified as part of the cells? CORRECT ANSW...

Cell Theory All living organisms are composed of one or more cells. What are the 3 important parameters in microsopy? Magnification, resoultion, and contrast. Cell structure relies on what 4 factors? Matter, energy, organization, and information What are the 2 categories all forms of life based on cell structure? Prokaryotes and Eukaryotes. The proetome of a cell determines its ? Structure and function. Prokaryotic cell Reletively simple sturctures without a nucleus, put into either bacte...