Answer the following question given this paragraph: RNA consists of just one chain of nucleotides. DNA consists of two chains. Nitrogen bases on the two chains of DNA form hydrogen bonds with each other. Hydrogen bonds are relatively weak bonds that form between a positively charged hydrogen atom in one molecule and a negatively charged atom in another molecule. Hydrogen bonds form only between adenine and thymine, and between guanine and cytosine. These bonds hold the two chains together and give DNA is characteristic double helix, or spiral, shape. Q: What has two chains of nucleotides, one more than rna? Choices: - gna - fna - mna - dna A:
dna
Answer the following question given this paragraph: When compounds are synthesized, they often have contaminating materials mixed in with them. The process of recrystallization can be used to remove these impurities. The crystals are dissolved in a hot solvent, forming a solution. When the solvent is cooled the compound is no longer as soluble and will precipitate out of solution, leaving other materials still dissolved. Q: Recrystallization is a process that can remove what, which result when compounds are synthesized? Choices: - chemicals - substances - minerals - contaminants A:
contaminants
Q: Answer the following question given this paragraph: http://www. explainthatstuff. com/how-geiger-counters-work. html. Q: The cecum is the first part of what structure, where wastes in a liquid state enter from the small intestine? Choices: - duodenum - esophagus - appendix - large intestine A:
A: large intestine
Question: Answer the following question given this paragraph: Other lipoproteins also transport lipids throughout the body, but different types of lipoproteins tend to serve different functions. We will discuss some of these differences in the section below on cholesterol and heart disease. Lipoproteins are often classified into five different groups based on their densities. In increasing order of density, these groups include chylomicrons, very-low-density lipoproteins (VLDL), intermediate-density lipoproteins (IDL), low-density lipoproteins (LDL), and high-density lipoproteins (HDL). Q: On what basis are lipoproteins classified? Choices: - diameter - mass - weight - density A:
Answer: density
*Question*
Answer the following question given this paragraph: In stage two, the pyruvate molecules are transported into the mitochondria. The mitochondria are the organelles known as the energy "powerhouses" of the cells ( Figure below ). In the mitochondria, the pyruvate, which have been converted into a 2-carbon molecule, enter the Krebs cycle. Notice that mitochondria have an inner membrane with many folds, called cristae . These cristae greatly increase the membrane surface area where many of the cellular respiration reactions take place. Q: What organelles are known as the energy "powerhouses" of the cells? Choices: - proteins - atoms - carbohydrates - mitochondria A:
**Answer**
mitochondria
(Question)
Answer the following question given this paragraph: Most reptiles reproduce sexually and have internal fertilization. They lay eggs on land and generally do not provide parental care. Reptile hatchlings look like miniature adults. They lack a larval stage and do not go through metamorphosis. Q: What type of fertilization do most reptiles have? Choices: - spawning - budding - external - internal A:
(Answer)
internal