Answer the following question given this paragraph: Just as millions of different words are spelled with our 26-letter English alphabet, millions of different proteins are made with the 20 common amino acids. However, just as the English alphabet can be used to write gibberish, amino acids can be put together in the wrong sequence to produce nonfunctional proteins. Although the correct sequence is ordinarily of utmost importance, it is not always absolutely required. Just as you can sometimes make sense of incorrectly spelled English words, a protein with a small percentage of "incorrect" amino acids may continue to function. However, it rarely functions as well as a protein having the correct sequence. There are also instances in which seemingly minor errors of sequence have disastrous effects. For example, in some people, every molecule of hemoglobin (a protein in the blood that transports oxygen) has a single incorrect amino acid unit out of about 300 (a single valine replaces a glutamic acid). That "minor" error is responsible for sickle cell anemia, an inherited condition that usually is fatal. Q: Just as millions of different words are spelled with our 26-letter english alphabet, millions of different proteins are made with the 20 common what? Choices: - mutation acids - peptides - enzymes - amino acids A:
amino acids
(Question)
Answer the following question given this paragraph: Dalton's theory was soon widely accepted. Most of it is still accepted today. The only part that is no longer accepted is his idea that atoms are the smallest particles. Scientists now know that atoms consist of even smaller particles. Q: What was once believed to be the smallest of all particles, as dalton's theory proposed? Choices: - nucleus - molecule - neutron - atom A:
(Answer)
atom
Ques: Answer the following question given this paragraph: High-energy electrons are released from NADH and FADH 2 , and they move along electron transport chains, like those used in photosynthesis. The electron transport chains are on the inner membrane of the mitochondrion. As the high-energy electrons are transported along the chains, some of their energy is captured. This energy is used to pump hydrogen ions (from NADH and FADH 2 ) across the inner membrane, from the matrix into the intermembrane space. Electron transport in a mitochondrion is shown in Figure below . Q: The electron transport chains are located on the inner membrane of which organelle? Choices: - chloroplast - lysosome - axon - mitochondrion A:
Ans: mitochondrion
(Q).
Answer the following question given this paragraph: Changes in chromosome number can lead to disorders like Down syndrome. Q: Changes in the number of what can lead to disorders like down syndrome? Choices: - prokaryotes - dna - genes - chromosomes A:
(A).
chromosomes
Ques:Answer the following question given this paragraph: Prevailing winds are the result of atmospheric circulation cells. They influence the climate of a region. Q: What do prevailing winds influence? Choices: - weather - temperature - barometric pressure - climate A:

Ans:climate
Answer the following question given this paragraph: Physical chemistry is the study of macroscopic properties, atomic properties, and phenomena in chemical systems. A physical chemist may study such things as the rates of chemical reactions, the energy transfers that occur in reactions, or the physical structure of materials at the molecular level. Q: What is the study of macroscopic properties, atomic properties, and phenomena in chemical systems? Choices: - differential chemistry - thermal chemistry - molecular chemistry - physical chemistry A:
physical chemistry