Answer the following question given this paragraph: Watch this animation (http://openstaxcollege. org/l/p53_cancer) to learn more about the use of p53 in fighting cancer. Proto-oncogenes are positive cell-cycle regulators. When mutated, proto-oncogenes can become oncogenes and cause cancer. Overexpression of the oncogene can lead to uncontrolled cell growth. This is because oncogenes can alter transcriptional activity, stability, or protein translation of another gene that directly or indirectly controls cell growth. An example of an oncogene involved in cancer is a protein called myc. Myc is a transcription factor that is aberrantly activated in Burkett's Lymphoma, a cancer of the lymph system. Overexpression of myc transforms normal B cells into cancerous cells that continue to grow uncontrollably. High B-cell numbers can result in tumors that can interfere with normal bodily function. Patients with Burkett's lymphoma can develop tumors on their jaw or in their mouth that interfere with the ability to eat. Q: Proto-oncogenes are positive cell-cycle regulators but when mutated, they can become what? Choices: - microbes and cause cancer - bacteria and cause cancer - cultigens and cause cancer - oncogenes and cause cancer A:
oncogenes and cause cancer
(Question)
Answer the following question given this paragraph: The walls of the ventricle are lined with trabeculae carneae, ridges of cardiac muscle covered by endocardium. In addition to these muscular ridges, a band of cardiac muscle, also covered by endocardium, known as the moderator band (see Figure 19.9) reinforces the thin walls of the right ventricle and plays a crucial role in cardiac conduction. It arises from the inferior portion of the interventricular septum and crosses the interior space of the right ventricle to connect with the inferior papillary muscle. When the right ventricle contracts, it ejects blood into the pulmonary trunk, which branches into the left and right pulmonary arteries that carry it to each lung. The superior surface of the right ventricle begins to taper as it approaches the pulmonary trunk. At the base of the pulmonary trunk is the pulmonary semilunar valve that prevents backflow from the pulmonary trunk. Q: What reinforces the thin walls of the right ventricle and plays a crucial role in cardiac conduction? Choices: - pores band - moderator valve - pores valve - moderator band A:
(Answer)
moderator band
Ques: Answer the following question given this paragraph: The Sun gives off energy in tiny packets called photons . Photons travel in waves. Figure below models a wave of light. Notice the wavelength in the figure. Waves with shorter wavelengths have more energy. Q: What are the tiny packets of energy the sun gives off called? Choices: - ions - electrons - neutrons - photons A:
Ans: photons
(Q).
Answer the following question given this paragraph: When two different alleles (heritable factors) are inherited together, one may be expressed, while the effect of the other may be "silenced. " In the case of pod color, the allele for green pods is always expressed and is dominant . The allele for yellow pods, which is not expressed, is recessive . For instance, if a plant inherits a "yellow-pod" allele and a "green pod" allele, it will have only green pods. Q: What's the term for an allele that's always expressed over another? Choices: - prevalent - mutated - recessive - dominant A:
(A).
dominant
Ques:Answer the following question given this paragraph: Figure above shows the accumulation of radioactive compounds that bind to dopamine receptors. The non-addicted individuals have large numbers of receptors for dopamine. The addicted persons show less binding to these receptors, indicating that fewer receptors are present. Q: Addiction affects what type of chemical receptors within the brain? Choices: - mitochondria receptors - serotonin receptors - bind receptors - dopamine receptors A:

Ans:dopamine receptors
Ques:Answer the following question given this paragraph: Magma at the mid-ocean ridge creates new seafloor. Q: What creates a new seafloor at the mid-ocean ridge? Choices: - earthquake - hurricane - glaciers - magma A:

Ans:
magma