The START codon is
A) AUG
B) UAU
C) UGA
D) AGA
Ans: A) AUG
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For each function described below, choose the cytoskeletal element it best characterizes (some of the functions listed are carried out by more than one cytoskeletal element): a. microtubules b. microfilaments c. intermediate filaments
________ provide structural support for epithelial cell shape (keratins) ________ enable movement of cells ________ enable movement of substances within cells ________ provide structural support for fibroblast cell shape (vimentins) ________ arrange and tether organelles within the cytoplasm ________ provide cellular movement as a component of cilia flagella ________ provide structural support for nuclear envelopes (lamins) ________ attach to the cytoplasmic surfaces of desmosomes ________ provide structural support to cells and layers of cells through attachment to adherens junctions ________ help cells to withstand compression when organized a spokelike array by the centrosome ________ separate chromosomes during cell division when organized in a spindle apparatus _______ provide a contractile ring to separate cells during cell division ________ support the plasma membrane and organize membrane proteins ________ shorten cell shapes during contraction What will be an ideal response?
In the 1700s, a French scientist, Antoine Lavoisier, gained new experimental information by reacting a metal and an acid. His observation of the results seemed to show that much of the metal had been lost in the chemical reaction. Upon weighing the products, the total amounts of materials had not changed during the reaction. This research resulted in the law of conservation of mass. This law also applies to biology, because the materials we are made of are that change forms, but aren't truly lost through biochemical reactions.
A. matter B. isotopes C. energy D. metals E. solutions
Some strategies for protecting endangered species include the use of DNA profiling to identify illegally traded animal
parts and assisted reproduction techniques to help boost population numbers. These techniques are examples of _____. a. biotechnology b. gene pooling c. biosynthetics d. environmental forensics e. DNA cloning
Stoma open at night in plants that use ________ photosynthesis.
What will be an ideal response?