Answer the following question given this paragraph: Simple Model of DNA. In this simple model of DNA, each line represents a nucleotide chain. The double helix shape forms when the two chains wrap around the same axis. Q: What distinctive dna shape forms when the two nucleotide chains wrap around the same axis? Choices: - single spiral - chain helix - double spiral - double helix A:
double helix
Answer the following question given this paragraph: The fatty material inside the artery on the right is plaque. Notice how much narrower the artery has become. Less blood can flow through it than the normal artery. Q: What fatty material inside arteries can restrict blood flow in the artery? Choices: - marble - collagen - cholesterol - plaque A:
plaque
Q: Answer the following question given this paragraph: The pressure of ocean water increases rapidly as the water gets deeper. Q: What property of ocean water increases rapidly as the water gets deeper? Choices: - visability - speed - salt content - pressure A:
A: pressure
Question: Answer the following question given this paragraph: Characteristics that are encoded in DNA are called genetic traits . Different types of human traits are inherited in different ways. Some human traits have simple inheritance patterns like the traits that Gregor Mendel studied in pea plants. Other human traits have more complex inheritance patterns. Q: Genetic traits are characteristics encoded in what? Choices: - nuclei - bacteria - rna - dna A:
Answer: dna
*Question*
Answer the following question given this paragraph: Glaciers and ice sheets are melting. This can be seen clearly in photographs. The glaciers advanced during the Pleistocene ice age. They have been melting back since then, except for during the Little Ice Age. However, the rate of melting has increased tremendously in recent decades. Q: Glaciers have been melting since what period? Choices: - industrial age - bronze age - stone age - pleistocene ice age A:
**Answer**
pleistocene ice age
Q: Answer the following question given this paragraph: Figure 3.31 A nucleotide is made up of three components: a nitrogenous base, a pentose sugar, and one or more phosphate groups. Carbon residues in the pentose are numbered 1 through 5 (the prime distinguishes these residues from those in the base, which are numbered without using a prime notation). The base is attached to the 1 position of the ribose, and the phosphate is attached to the 5 position. When a polynucleotide is formed, the 5 phosphate of the incoming nucleotide attaches to the 3 hydroxyl group at the end of the growing chain. Two types of pentose are found in nucleotides, deoxyribose (found in DNA) and ribose (found in RNA). Deoxyribose is similar in structure to ribose, but it has an H instead of an OH at the 2 position. Bases can be divided into two categories: purines and pyrimidines. Purines have a double ring structure, and pyrimidines have a single ring. Q: What kind of structure do purines have? Choices: - triple ring structure - single ring structure - helical stucture - double ring structure A:
A: double ring structure