Answer the following question given this paragraph: The Calvin cycle has three major steps: carbon fixation, reduction, and regeneration. All three steps take place in the stroma of a chloroplast. Q: What is the first step of the calvin cycle called? Choices: - dioxide fixation - carbon maturation - breath fixation - carbon fixation A:
carbon fixation
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Answer the following question given this paragraph: 5.2 Accessory Structures of the Skin Accessory structures of the skin include hair, nails, sweat glands, and sebaceous glands. Hair is made of dead keratinized cells, and gets its color from melanin pigments. Nails, also made of dead keratinized cells, protect the extremities of our. Q: What does hair get its color from? Choices: - elasticity pigments - stimulating pigments - fluorescent pigments - melanin pigments A:
melanin pigments
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Answer the following question given this paragraph: Transmembrane proteins span the entire plasma membrane. Their function is mainly to regulate the transport of specific molecules across the membrane. There are two basic types of transmembrane proteins, alpha-helical and beta-barrels, which are discussed in Organic Compounds: Proteins (Advanced) . Q: What proteins span the entire plasma membrane? Choices: - sequence - amino acids - cytoplasm - transmembrane A:
transmembrane
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Answer the following question given this paragraph: Electron configuration notation eliminates the boxes and arrows of orbital filling diagrams. Each occupied sublevel designation is written followed by a superscript that is the number of electrons in that sublevel. For example, the hydrogen configuration is 1 s 1 , while the helium configuration is 1 s 2 . Multiple occupied sublevels are written one after another. The electron configuration of lithium is 1 s 2 2 s 1 . The sum of the superscripts in an electron configuration is equal to the number of electrons in that atom, which is in turn equal to its atomic number. Q: The sum of the superscripts in an electron configuration is equal to the number of electrons in that atom, which is in turn equal to what number? Choices: - metallic number - shell number - orbital number - atomic number A:
atomic number
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