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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] 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] 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 is most likely to do the least damage to a cell? A) Frameshift mutation B) Nonsense mutation C) Missense mutation D) All are always lethal

[Answered] In some bees, thin stripes $(S)$ are dominant over thick stripes $(s)$, and black eyes $(B)$ are dominant over gray eyes $(b)$. Complete a dihybrid cross for parents with the genotypes SsBB and ssBb and determine the likelihood of offspring with the genotype ssBB.

[Answered] Joe denied being the father of Lisa. Lisa's mom took Joe to court to prove he is Lisa's biological father. The way to prove this would be by: A. DNA profiling B. recombinant DNA C. hybridization D. cloning