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Questions in biology

[Answered] Which of the following occurs when a peptide bond forms between two amino acids? A. A covalent bond forms between the carboxyl groups of two amino acids with the addition of a water molecule. B. A covalent bond forms between the R groups of two amino acids with the release of a water molecule. C. A water molecule is released as a covalent bond forms between a carboxyl group of one amino acid and an amino group of another amino acid. D. A water molecule is consumed as a covalent bond forms between a carboxyl group of one amino acid and an amino group of another amino acid.

[Answered] The ______ detect painful stimuli in the joint and report the amount of movement in the joint. A. sensory nerves B. blood supply C. synovial membrane

[Answered] Which structure of the human female's reproductive system releases eggs in a monthly cycle? A. Fallopian tube B. Ovary C. Cervix D. Uterus

[Answered] (i) The additional circular pieces of DNA present in a bacterial cell are: (a) RNA (b) nucleotides (c) chromatids (d) plasmids (ii) What may be the objective of genetic modifications of plants? (a) Production of disease resistant plants (b) Improvement in nutritional quality of plants (c) Production of herbicide resistant plants (d) All of these (iii) Plasmid and attached foreign gene with it are collectively called: (a) recombinant cell (b) recombinant DNA (c) recombinant plasmid (d) recombinant chromosome (iv) The organisms whose cells and plasmids are usually used in genetic engineering are: (a) bacteria (b) fungi (c) algae (d) viruses (v) Sections of DNA serving as codes for developing characters in an organism are called: (a) genes (b) nucleotides (c) plasmids (d) proteins (vi) Which of the following is not a biotechnology product? (a) Insulin (b) Quinine (c) Beta-endorphin (d) Interferon (vii) How do genetic engineers get insulin for diabetic patients? (a) Isolate from human pancreas (b) Isolate from pancreas of other animals (c) Insulin gene inserted in human pancreas (d) Insulin gene inserted in bacteria

[Answered] Which product of respiration is considered waste material and leaves the alveoli? A. oxygen B. water C. carbon dioxide D. carbon monoxide

[Answered] What is the term for biologically mediated transfer of water to the atmosphere, primarily by plants? A) Evaporation B) Transpiration C) Precipitation D) Infiltration

[Answered] 1. I jump really high, my skin is smooth and I breathe through it. Frog 2. I live in Cuba, I'm the smallest bird, and weigh 1.6 grams. 3. I soar high in the sky, searching for dead animals to eat. I have a hooked beak with excellent eyesight. Paule

[Answered] 1. Why are individuals different from one another? 2. How are traits passed on from one generation to the next? 3. How many chromosomes do humans have?

[Answered] The world's population of cheetahs has very little genetic diversity. The population has dropped drastically in recent years, and the bottleneck effect has altered genetic frequencies. What mechanism of evolution causes this change? A. Natural selection B. Sexual selection C. Genetic drift D. Mutation

[Answered] You wish to replicate the experiment with fruit flies and alcohol. You expose some flies to alcohol and they all die. Which reason explains why your experiment was not successful? A. You exposed the flies to alcohol too rapidly for them to adapt to the change. B. The flies were already resistant to alcohol, so no change was observed. C. You started with such a small population of flies that none of the flies had the tolerance allele. D. You did not use enough alcohol.