Midterm 1 stuff (1‚ 25‚ 26‚ 27‚ 28) 2) What characterizes a prokaryotic cell? a. the lack of ribosomes b. the lack of a membrane-enclosed nucleus c. the presence of a nucleus with no DNA d. the presence of mitochondria e. having a cell wall without a cell membrane 3) Which of the following does NOT comprise a logical hierarchy of organization? a. family‚ order‚ class‚ phylum‚ kingdom b. molecules‚ cells‚ tissues‚ organ systems‚ populations c. organisms‚ populations‚ communities‚ biomes
Premium Bacteria Eukaryote DNA
MATERIAL AND METHODS Recombinant protein production The recombinant T-Rp3 was expressed in E. coli BL21 (DE3) as previously described (Favaro et al.‚ 2014) and purified by a single step His-based affinity chromatography in an ÄKTA purifier FPLC (GE Healthcare). Protein was then dialyzed against 50 mM MES buffer (pH 6‚0) overnight at room temperature‚ frozen in liquid nitrogen and stored at -80 ˚C after 0.22 μm pore membrane filtration. Evaluation of DNA-protein interaction by gel retardation
Premium Bacteria DNA Molecular biology
MITOSIS The Stages of Mitosis Mitosis is simply described as having four stages—prophase‚ metaphase‚ anaphase‚ and telophase; the steps follow one another without interruption. The entire four-stage division process averages about one hour in duration‚ and the period between cell divisions‚ called interphase or interkinesis‚ varies greatly but is considerably longer. During INTERPHASE the chromosomes are dispersed in the nucleus and appear as a network of long‚ thin threads or filaments‚ called the
Premium Mitosis Chromosome Cell cycle
R E V I E W S H E E T EXERCISE 4 Print Form Anatomy of the Composite Cell 1. Define the following terms: are the metabolic machinery of the cell‚ the are highly organized tp carry out specific functions of the organelle: cell as a whole. the structural and functional unit of all living things. cell: 2. Although cells have differences that reflect their specific functions in the body‚ what functions do they have in common? All cells can maintain their own boundaries‚ metabolize
Premium
discuss their relevance to humans. Analysis / Data: Activity Page 1 Present in all cells Present only in (some or all) prokaryotes Present only in (some or all) eukaryotes DNA X Nucleus X Ribosomes X Cell membrane X Flagella made of microtubules X Cytoskeleton X Membranous organelles X Cell wall X Divide by mitosis X Divide by binary fission X Activity Page 4 Sample Name Physical Description (What does it look like?) Example species Gram-positive cocci in clusters Little groups
Premium Bacteria Microbiology
Making Agar Cushions 1. Start with wearing gloves and swabbing them with 70% ethanol to keep the materials that will be used in the experiment sterile. 2. Wipe the work station with Wescodyne and paper towels. It is important to keep the sterile materials such as slides in petri dish‚ Pasteur pipette in container and forceps covered as much as possible. 3. Place four to five filter papers in the petri dish and drip few drops of water on the strips‚ this will maintain moisture in the agar cushions
Premium Petri dish Water Agar plate
SWTJC 2401 Lecture Exam Review 1 Part 1 Multiple Choice Questions Part 2 Short answer questions Part 3 Crtical thinking questions Chapter 1. An Introduction to the Human Body 1. This is the study of the functions of body structures. a. Physiology 2. This is defined as a group of cells with similar structure and function. b. Tissue 3. Using your fingers to find your pulse on your wrist is an example of c. Palpation 4. Percussion
Premium
the anatomical structure of ten different organelles in the cell and their respective functions. Ribosomes Protein formation Found on the surface of rough endoplasmic reticulum Two types 70S and 80S Centrioles Cylindrical in structure formed by microtubules. Participate in cellular division Chloroplasts It’s a type of plastids found in plant cells Contain green chlorophyll which helps in photosynthesis. Endoplasmic reticulum Found fused to nuclear membrane Serves as cell’s transport system Two types
Premium Tissues Cell Connective tissue
Medicine from the Sea Derek Bunkofske Conservation Ecology ENVS 201 Charles Cole Sea Changes: Medicine from the Sea This was truly an amazing video that really made me realize just how amazing this planet really is‚ along with the special human beings that inhabit it. I know that sounds a little corny‚ but I don’t really know any other way of putting it. So many questions start to creep into my head after seeing something so incredible come from something that has been on this earth for
Premium Ocean Algae Cyanobacteria
SPECIAL SENSES GENERAL PRESENTATION Overview of the Nervous System • Endocrine and nervous systems maintain internal coordination – Endocrine system: communicates by means of chemical messengers (hormones) secreted into to the blood – Nervous system: employs electrical and chemical means to send messages from cell to cell 12-2 Overview of the Nervous System • Nervous system carries out its task in three basic steps • Sense organs receive information about changes in the body and external environment
Premium Nervous system Neuron Action potential