ATI Biology 3

Question 1

Which type of macromolecule are enzymes primarily composed of?

Accepted Answer

Proteins

Answer

Most enzymes are proteins folded into specific catalytic shapes.

Question 2

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

Accepted Answer

Regulating what enters and exits the cell

Answer

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

Question 3

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

Accepted Answer

9:3:3:1

Answer

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

Question 4

Which structure contains the genetic material in a eukaryotic cell?

Accepted Answer

Nucleus

Answer

The nucleus houses and protects the cell's DNA.

Question 5

What gas is released as a byproduct of photosynthesis?

Accepted Answer

Oxygen

Answer

Photosynthesis splits water and releases oxygen as a byproduct.

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