Free Access WGU.Introduction-to-Biology.v2026-10-29.q27 Practice Test (Page 6)

Question 21

Molecules withhydrophilic headsandhydrophobic tailsform round structures with tails facing inward when placed in water. What role do such molecules play in a cell?

A.Store genetic information

B.Catalyze chemical reactions

C.Store energy

D.Form membranes

Question 22

Which property of water is illustrated byinsects walking on water?

A.Cohesion

B.Temperature stability

C.Good solvent

D.Change in density when frozen

Question 23

Agroup of lionsthat preys on deer constitutes which ecological level?

A.Community

B.Population

C.Biome

D.Ecosystem

Question 24

Which statement correctly describes the flow of information duringgene expression?

A.RNA is formed from protein, then DNA is formed from RNA

B.DNA is formed from protein, then RNA is formed from DNA

C.RNA is formed from DNA, then protein is formed from RNA

D.DNA is formed from RNA, then protein is formed from DNA

Question 25

A cell is bounded by acell walland has an organelle that performsphotosynthesis. Which type of eukaryotic cell and organelle are described?

A.Both plant and animal; mitochondria

B.Animal; Golgi apparatus

C.Plant; chloroplast

D.Animal; ribosome

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Question 25

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