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Questions in biology

[Answered] Which of the following statements about antibodies is false? A. Antibodies are produced by different combinations of soluble proteins in the blood called complement. B. When antibodies bind to a bacterial cell, it may keep that cell from adhering to host cells. C. The specific receptors on T cells that would interact with a specific antigen are the same shape as antibodies that will interact with that antigen. D. By binding to antigens, antibodies mark those antigens for destruction by macrophages. E. By binding to an invader, antibodies attract proteins that lyse the target membrane.

[Answered] Which kind of bonds are most easily broken in water? A. ionic B. peptide C. disulfide D. single covalent E. double covalent

[Answered] In humans, having freckles is the result of a dominant gene, and not having freckles is a recessive trait. If a freckled man who is homozygous for this trait has a child with a woman who does not have freckles, which of the following best describes how their child would most likely appear? A. Their child would not have freckles if the father passes on the recessive allele. B. Their child would have freckles. C. Their child would not have freckles. D. Their child would have freckles since the mother is a carrier for freckles.

[Answered] Briefly describe he function of the cell parts (organelles)

[Answered] Tissue that lines the outer and inner surfaces of the body in protective sheets of tightly packed cells is known as: (A) epithelial tissue. (B) adipose tissue. (C) fibrous connective tissue. (D) nervous tissue. (E) muscle tissue.

[Answered] How can forests provide a sustainable yield?

[Answered] Explain how scientists use recombinant DNA technology to produce the drug insulin. Be sure to also explain why a gene from one organism can be expressed by another organism.

[Answered] What is the theme of "Henry Huggins" by Beverly Cleary? Describe the beginning, middle, and end plot, and the theme of "Ralph S. Mouse."

[Answered] What are three common adaptations in the deep pelagic realm?

[Answered] A student pushes against a tree with a force of 10 newtons (N). The tree does not move. What is the amount of force exerted by the tree on the student? 1) 0 N 2) 5 N 3) 10 N 4) 20 N