Q: What mineral is made of one silicon atom and two oxygen atoms? Read this paragraph and choose the correct option from the provided answers: 5. Quartz is made of one silicon atom and two oxygen atoms. If you find a mineral and find that it is made of one silicon atom and one oxygen atom is it quartz?. Choices: - glass - pumice - cobalt - quartz A:
quartz

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Q: What happens to an animal's telomeres as it ages? Read this paragraph and choose the correct option from the provided answers: As cells divide, their chromosomes get shorter. This is because the telomeres, the DNA sequences at both ends of a chromosome, lose material every time the DNA is replicated. The older the animal is, the shorter its telomeres will be, because of the number of cell cycles the cells have been through This is a natural part of aging. So, what happens to the clone if its transferred nucleus is already fairly old? Will the shortened telomeres affect its development or lifespan? The answer is still unclear. But starting a new organisms with "old" DNA with shortened telomeres is bound to have some effects, at least in some clones. Some cloned animals may be affected, others may not. Dolly the sheep's chromosomes did have shorter telomere lengths than normal. This means that Dolly's cells were aging faster than the cells from a normal sheep. Choices: - divide - lengthen - multiply - shorten A:
(Answer)
shorten

Ques: Q: The eukaryotic cell cycle is regulated by a what? Read this paragraph and choose the correct option from the provided answers: 12.3 The eukaryotic cell cycle is regulated by a molecular control system. Choices: - anti-lock control system - protons control system - nucleus control system - molecular control system A:
Ans: molecular control system

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Q: Animal-like protists are called what? Read this paragraph and choose the correct option from the provided answers: Animal-like protists are called protozoa. Protozoa are single-celled eukaryotes that share some traits with animals. Like animals, they can move, and they are heterotrophs . That means they eat things outside of themselves instead of producing their own food. Animal-like protists are very small, measuring only about 0.010.5mm. Animal-like protists include the flagellates, ciliates, and the sporozoans. Choices: - bacteria - genus - larvae - protozoa A:
(A).
protozoa

Ques:Q: Uncontrolled cell growth can lead to tumors and what disease? Read this paragraph and choose the correct option from the provided answers: 10.4 | Cancer and the Cell Cycle By the end of this section, you will be able to: Describe how cancer is caused by uncontrolled cell growth Understand how proto-oncogenes are normal cell genes that, when mutated, become oncogenes Describe how tumor suppressors function Explain how mutant tumor suppressors cause cancer Cancer comprises many different diseases caused by a common mechanism: uncontrolled cell growth. Despite the redundancy and overlapping levels of cell cycle control, errors do occur. One of the critical processes monitored by the cell cycle checkpoint surveillance mechanism is the proper replication of DNA during the S phase. Even when all of the cell cycle controls are fully functional, a small percentage of replication errors (mutations) will be passed on to the daughter cells. If changes to the DNA nucleotide sequence occur within a coding portion of a gene and are not corrected, a gene mutation results. All cancers start when a gene mutation gives rise to a faulty protein that plays a key role in cell reproduction. The change in the cell that results from the malformed protein may be minor: perhaps a slight delay in the binding of Cdk to cyclin or an Rb protein that detaches from its target DNA while still phosphorylated. Even minor mistakes, however, may allow subsequent mistakes to occur more readily. Over and over, small uncorrected errors are passed from the parent cell to the daughter cells and amplified as each generation produces more non-functional proteins from uncorrected DNA damage. Eventually, the pace of the cell cycle speeds up as the effectiveness of the control and repair mechanisms decreases. Uncontrolled growth of the mutated cells outpaces the growth of normal cells in the area, and a tumor ("-oma") can result. Choices: - vascular disease - cirrhosis - kidney failure - cancer A:

Ans:cancer

Q: What is the force of attraction that holds together positive and negative ions? Read this paragraph and choose the correct option from the provided answers: An ionic bond is the force of attraction that holds together positive and negative ions. It forms when atoms of a metallic element give up electrons to atoms of a nonmetallic element. The Figure below shows how this happens. Choices: - electron bond - magnetic bond - integral bond - ionic bond A:
ionic bond