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
Answer the following question given this paragraph: Q: The term ion applies to entire molecules that are? Choices: - magnetic - positively charged protons - neutrally charged - electrically charged A:
electrically charged
Q: Answer the following question given this paragraph: Recall that eukaryotic organisms also include animals, protists, and fungi. Eukaryotes have cells with nuclei that contain DNA, and membrane-bound organelles, such as mitochondria. Photosynthesis is the process by which plants capture the energy of sunlight and use carbon dioxide from the air (and water) to make their own food, the carbohydrate glucose. Plants have chloroplasts, the organelle of photosynthesis, and are known as producers and autotrophs. Other organisms are heterotrophic consumers, meaning they must obtain their nutrients from another organism, as these organisms lack chloroplasts. Lastly, plants must be multicellular, composed of more than one cell. There are no single-celled plants. Recall that some protists, such as algae, are eukaryotic and photosynthetic but are not considered plants. Unlike plants, algae is mostly unicellular. Q: What is the process by which plants capture the energy of sunlight and use carbon dioxide from the air (and water) to make their own food called? Choices: - spermatogenesis - photochemistry - atherosclerosis - photosynthesis A:
A: photosynthesis
Question: Answer the following question given this paragraph: Earth is warmed by energy that radiates from the sun. Earth radiates some of the energy back into space. Greenhouse gases (GHGs) trap much of the re-radiated energy, causing an increase in the temperature of the atmosphere close to the surface. Q: What is the major source of warmth for earth? Choices: - the Moon - seasons - equator - the sun A:
Answer: the sun
*Question*
Answer the following question given this paragraph: A lever is a simple machine consisting of a bar that rotates around a fixed point. The fixed point of a lever is called the fulcrum. Like other machines, a lever makes work easier by changing the force applied to the machine or the distance over which the force is applied. For a video introduction to levers using skateboards as examples, go to this URL:. Q: What do you call the fixed point of a lever? Choices: - base - caliper - apex - fulcrum A:
**Answer**
fulcrum
Answer the following question given this paragraph: Endothermic reactions absorb energy from the surroundings as the reaction occurs. When 1 mol of calcium carbonate decomposes into 1 mol of calcium oxide and 1 mol of carbon dioxide, 177.8 kJ of heat is absorbed. The process is shown visually in Figure above (B). The thermochemical reaction is shown below. Q: What kind of reactions absorb energy from their surroundings as they occur? Choices: - exothermic - hydrostatic - autotrophic - endothermic A:
endothermic