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Praxis 5442 Life Science Questions and Answers Latest Version Graded A+
Why do plants appear green in color?✔✔Because chlorophyll reflects green light
What is the role of ribosomes in a cell?✔✔To synthesize proteins
How does genetic information pass from parent to offspring?✔✔Through DNA inherited during reproduction
What is the process by which plants make their own food using sunlight?✔✔Photosynthesis
What molecule carries genetic instructions in most living organisms?
✔✔DNA
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What type of reproduction involves only one parent and produces genetically identical offspring?✔✔Asexual reproduction
What is the function of the nucleus in a eukaryotic cell?✔✔To store and protect genetic material
What organ system is responsible for transporting oxygen throughout the body?✔✔Circulatory system
What structure in plant cells captures sunlight for photosynthesis?✔✔Chloroplast
What process results in the formation of gametes with half the number of chromosomes?✔✔Meiosis
What is the primary function of white blood cells?✔✔To defend the body against pathogens
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What process do cells use to divide and produce two identical daughter cells?✔✔Mitosis
What are the basic building blocks of proteins?✔✔Amino acids
What is the main function of the digestive system?✔✔To break down food into nutrients the body can absorb
What gas do humans exhale that plants use in photosynthesis?✔✔Carbon dioxide
What is the term for a change in an organism’s DNA sequence?✔✔Mutation
What part of the brain controls involuntary actions like heartbeat and breathing?✔✔Brainstem
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What type of cell does not have a nucleus?✔✔Prokaryotic cell
What is the function of enzymes in biological processes?✔✔To speed up chemical reactions
What is a genotype?✔✔The genetic makeup of an organism
What structure allows gases to enter and leave a plant’s leaf?✔✔Stomata
What is the term for a trait that is always expressed when present in the genotype?✔✔Dominant trait
How do vaccines help prevent disease?✔✔By stimulating the immune system to recognize and fight pathogens
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