Answer the following question given this paragraph: Acetyl-CoA is formed from the breakdown of carbohydrates, lipids, and proteins. It is used in many biochemical pathways. Q: Acetyl-coa is formed from the breakdown of carbohydrates, lipids, and what else? Choices: - hormones - acids - hydrocarbons - proteins A:
proteins
(Question)
Answer the following question given this paragraph: Stage 1: Initiation. The two complementary strands are separated, much like unzipping a zipper. Special enzymes, including helicase, untwist and separate the two strands of DNA. Stage 2: Elongation. Each strand becomes a template along which a new complementary strand is built. DNA polymerase brings in the correct bases to complement the template strand, synthesizing a new strand base by base. A DNA polymerase is an enzyme that adds free nucleotides to the end of a chain of DNA, making a new double strand. This growing strand continues to be built until it has fully complemented the template strand. Stage 3: Termination. Once the two original strands are bound to their own, finished, complementary strands, DNA replication is stopped and the two new identical DNA molecules are complete. Each new DNA molecule contains one strand from the original molecule and one newly synthesized strand. The term for this mode of replication is "semiconservative," because half of the original DNA molecule is conserved in each new DNA molecule. This process continues until the cell's entire genome, the entire complement of an organism's DNA, is replicated. As you might imagine, it is very important that DNA replication take place precisely so that new cells in the body contain the exact same genetic material as their parent cells. Mistakes made during DNA replication, such as the accidental addition of an inappropriate nucleotide, have the potential to render a gene dysfunctional or useless. Fortunately, there are mechanisms in place to minimize such mistakes. A DNA proofreading process enlists the help of special enzymes that scan the newly synthesized molecule for mistakes and corrects them. Once the process of DNA replication is complete, the cell is ready to divide. You will explore the process of cell division later in the chapter. Q: The two complementary strands of what are separated, much like unzipping a zipper, in the initiation phase? Choices: - mRNA - Chromosomes - RNA - dna A:
(Answer)
dna
Ques: Answer the following question given this paragraph: An ionic compound contains positive and negative ions. Q: What type of ions do ionic compounds contain? Choices: - regular and irregular - positive and charged - negative and neutal - positive and negative A:
Ans: positive and negative
(Q).
Answer the following question given this paragraph: Scientists think of nature as a single system controlled by natural laws. Scientists strive to increase their understanding of the natural world by discovering natural laws. Laws of nature are expressed as scientific laws. A scientific law is a statement that describes what always happens under certain conditions in nature. Q: A statement that describes what always happens under certain conditions in nature is also known as what? Choices: - theory - hypothesis - scientific motion - scientific law A:
(A).
scientific law
Ques:Answer the following question given this paragraph: The chemical formulas for covalent compounds are referred to as molecular formulas because these compounds exist as separate, discrete molecules. Typically, a molecular formula begins with the nonmetal that is closest to the lower left corner of the periodic table, except that hydrogen is almost never written first (H2O is the prominent exception). Then the other nonmetal symbols are listed. Numerical subscripts are used if there is more than one of a particular atom. For example, we have already seen CH4, the molecular formula for methane. Naming binary (two-element) covalent compounds is similar to naming simple ionic compounds. The first element in the formula is simply listed using the name of the element. The second element is named by taking the stem of the element name and adding the suffix -ide. A system of numerical prefixes is used to specify the number of atoms in a molecule. Table 4.1 "Numerical Prefixes for Naming Binary Covalent Compounds" lists these numerical prefixes. Normally, no prefix is added to the first element's name if there is only one atom of the first element in a molecule. If the second element is oxygen, the trailing vowel is usually omitted from the end of a polysyllabic prefix but not a monosyllabic one (that is, we would say "monoxide" rather than "monooxide" and "trioxide" rather than "troxide"). Table 4.1 Numerical Prefixes for Naming Binary Covalent Compounds Number of Atoms in Compound. Q: What are the chemical formulas for covalent compounds referred to as? Choices: - nucleus formulas - magnetic formulas - Electron Formulas - molecular formulas A:

Ans:molecular formulas
Question: Answer the following question given this paragraph: Steam fog appears in autumn when cool air moves over a warm lake. Water evaporates from the lake surface. As the water vapor cools, it condenses. The fog appears like steam. Q: What appears in autumn when cool air moves over a warm lake? Choices: - misty fog - feature fog - movement fog - steam fog A:
Answer:
steam fog