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What are homologous chromosomes?

1. AChromosomes that are found only in gametes
2. BTwo identical copies of one chromosome made when DNA is replicated
3. CTwo chromosomes that are always the X and the Y
4. DA matching pair, one from each parent, that carry the same genes

What is the R group of an amino acid?

1. AThe side chain that differs between amino acids
2. BThe carboxyl group at one end
3. CThe peptide bond between two amino acids
4. DThe amino group that is shared by all amino acids

Mengapa virus tidak dapat bereproduksi sendiri?

1. AVirus tidak memiliki materi genetik apa pun, baik DNA maupun RNA
2. BVirus membelah hanya melalui meiosis
3. CVirus bereproduksi hanya di bawah sinar matahari
4. DVirus membutuhkan perangkat sel inang untuk membuat salinan

What is a random sample?

1. AA group made only of people who volunteer to take part
2. BA group where everyone in the population has an equal chance of being chosen
3. CA group chosen by the researcher because they are easy to reach and willing
4. DA group chosen because they are likely to support the hypothesis

Which statement about Archaea is correct?

1. AThey are eukaryotes that have a nucleus and membrane-bound organelles
2. BThey are prokaryotes, and many live in extreme environments
3. CThey are a type of virus
4. DThey are multicellular plants

What is the role of cholesterol in animal cell membranes?

1. AIt forms a rigid wall around the cell
2. BIt carries glucose molecules across the membrane into the cell
3. CIt stores the cell's genetic information
4. DIt keeps membrane fluidity stable as temperature changes

Para sukarelawan meminum 0, 100, atau 200 mg kafein, dan denyut jantung mereka diukur setelah 30 menit. Apa variabel terikatnya?

1. APara sukarelawan itu sendiri
2. BWaktu tunggu 30 menit
3. CDosis kafein
4. DDenyut jantung setelah 30 menit

Sweating cools the body. Which property of water best explains this?

1. AIt is less dense as ice than as a liquid
2. BIt is a nonpolar solvent
3. CIt takes a lot of heat energy to evaporate
4. DIt has a very low specific heat