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The double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together. Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain.
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Percolation in terms of biology means filtration of a liquid substance through a porous medium.
Answer:the answer is b:contain membrane folds called cristae, whereas chloroplasts contain disk-like vesicles in stacks called grana.
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