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Questions in biology

[Answered] A) Constitutive Perhaps 60-80% of genes are not regulated, but are C) Degenerative D) Repressed B) Continuous

[Answered] Which statement about the scientific method is true? A. The scientific method involves developing and testing conclusions. B. The scientific method is a linear approach to accumulating scientific knowledge. C. The scientific method is used in different ways by different scientists. D. The scientific method involves developing a question to answer a hypothesis.

[Answered] What characteristic of skeletal muscle fibers allows them to contract and move bones? A) The presence of thick and thin myofilaments organized into sarcomeres. B) The fibrous epimysium surrounding the fibers. C) The rich supply of blood vessels in skeletal muscle. D) The multinucleated structure of the fibers.

[Answered] Through which conversion is energy released? A. ADP to ATP B. ATP to ADP C. NADP${}^{+}$ to NADPH D. $CO _2$ and $H _2 O$ to $C _6 H _{12} O _6$ and $O _2$

[Answered] Which of the following contains hemoglobin? A. Neutrophils B. Lymphocytes C. Erythrocytes D. Thrombocytes

[Answered] The regulation of the lactose operon depends on the level of which of the following substances in the medium? A) DNA polymerase B) RNA polymerase C) Lactose D) Glucose E) C & D

[Answered] Now go to the Preventing Seasonal Flu with Vaccination page. Use the links on the page to construct one to two paragraphs in response to the following questions.

[Answered] Ionizing radiation causes A) DNA to break B) Bonding between adjacent thymines C) Nitrogenous base substitutions D) The formation of highly reactive ions

[Answered] How do vaccines work if the pathogen in them is dead? A. The vaccine alters your body chemistry so that whichever pathogen you are vaccinated against cannot even enter your body in the first place. B. It causes antibodies to be generated that take the form of the pathogen, so the next time it is encountered, the antibodies make the pathogen think the body is friendly and not a target. C. It causes memory cells to be generated so that next time the pathogen is encountered the immune response is very fast, killing the pathogen before it can do any harm. D. The immune system holds on to the dead pathogen from the vaccine, and if you are infected again, the new pathogen recognizes the dead

[Answered] Which of the following enzymes is mismatched? A. chymotrypsin; protein B. lipase; fat C. amylase; carbohydrate D. trypsin; starch