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Biology Flashcards

7 cards from real ATI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which type of macromolecule are enzymes primarily composed of?

    Answer: Proteins

    Most enzymes are proteins folded into specific catalytic shapes.

  2. What is the role of the cell membrane's phospholipid bilayer?

    Answer: Regulating what enters and exits the cell

    The selectively permeable bilayer controls movement of substances in and out.

  3. In a dihybrid cross of two heterozygous parents (AaBb), what is the phenotypic ratio of offspring?

    Answer: 9:3:3:1

    A cross of two AaBb individuals yields the classic 9:3:3:1 phenotypic ratio.

  4. Which structure contains the genetic material in a eukaryotic cell?

    Answer: Nucleus

    The nucleus houses and protects the cell's DNA.

  5. What gas is released as a byproduct of photosynthesis?

    Answer: Oxygen

    Photosynthesis splits water and releases oxygen as a byproduct.

  6. A cell with 46 chromosomes undergoes meiosis. How many chromosomes does each resulting gamete contain?

    Answer: 23

    Meiosis halves the chromosome number, producing haploid gametes with 23 chromosomes.

  7. Which term describes an organism's observable physical traits?

    Answer: Phenotype

    Phenotype refers to the expressed, observable characteristics of an organism.