ASSIGNMENTbiologychemical and cellular foundations of life Essay

ASSIGNMENTbiologychemical and cellular foundations of life - Essay Example , thus "passive" whereas in In active transport it is possible to go against the concentration gradient and an external source of energy like ATP is required to move the carrier and its materials thus, "active" 3a i A. Connective tissue B. Ciliated epithelium C. Columnar epithelium ii A. Connective tissue joints bone with muscles B. Ciliated epithelium forms lining of the respiratory systems C. Columnar epithelium forms lining of the digestive track. B i and ii The primary function of Connective tissues is to connect and join different organs. Ciliated epithelium tissue has cilia which helps cleaning the surface and restrict settlement of microorganism on to the surface. Columnar epithelium having a appendages called microvilli which helps in smooth movement of food particles in intestine. 4.a. Ribbon shape structure. b. It is a linear chain of amino acids. C.i. X- beta sheets Y-alpha helix ii. Hydrogen bonds d. Tertiary structure is responsible for formation of active site for lysozyme, the site responsible for the enzyme catalysis. 5.a. i-D ii-E iii-A iv-B v-C b. i. Glucose ii.a triglycride iii. an amino acid Simple sugar has aldehyde and ketone whereas Triglyceride contains fatty acids and glycerol . Amino acids possess carboxyl and amino groups. c. Uracil is present in RNA whereas Thymine is present in DNA. 6.a. Mitosis and Meiosis. b. Growth= Mitosis Reproduction = Meiosis C During fertilization two cells are combine and forms zygot. Number of chromosome should be maintain 2n and that's why It is necessary for reduce chromosome number to n fro 2n during gamete formation. 7a G1 phase, S or synthesis phase, andG2 phase. b. G1 phase: The first phase within interphase, from the end of the previous M phase till the beginning of DNA synthesis is...The hydrophobic domain consists of one, multiple, or a combination of -helices and sheet protein motifs. Most of the biological molecules are either larger in size or having definite charges on it. Hence The plasma membrane is non permeable to it. lipid bilayer is permeable only to water molecules and a few other small, uncharged, molecules like oxygen (O2) and carbon dioxide (CO2). These diffuse freely in and out of the cell. Passive transport involves carriers, channels, or direct diffusion through a membrane. This type of transport always operates from regions of greater concentration to regions of lesser concentration. No external source of energy is required, thus "passive" whereas in In active transport it is possible to go against the concentration gradient and an external source of energy like ATP is required to move the carrier and its materials thus, "active" G1 phase: The first phase within interphase, from the end of the previous M phase till the beginning of DNA synthesis is called G1 (G indicating gap or growth).