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
1
,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
2
,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
3
, 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
4
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
1
,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
2
,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
3
, 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
4
