DAT Biology Practice Test 5# Click to go back see all Biology Practice Tests 0% DAT Biology Practice Test #5 1 / 40 1. What does the concept of "inclusive fitness" refer to? Abbreviating what food looks like to locate it quickly Maximizing the quality of mates and offspring Maximizing the quantity of offspring Sacrifices made for relatives Grouping together to achieve a goal 2 / 40 2. In the context of animal behaviors, what does the term "stimulus discrimination" mean? As a stimulus occurs more often, the behavioral response increases. Learning to associate a behavior with a reward. Differentiation between a conditioned stimulus and other similar, but different, non-conditioned stimuli. The behavior of an animal changing speed in random directions in response to environmental conditions. Decreasing behavioral response in response to repetitive, meaningless stimulus. 3 / 40 3. Which of the following correctly represents the type II survivorship curve? Organism derives its energy from inorganic compounds and uses organic compounds as its primary carbon source Abundant, small offspring, mature quickly, no parental investment Organism derives its energy from light and uses CO2 as its primary carbon source Long gestation period, few, large offspring, long time to mature, significant parental investment Survival probability is constant regardless of age 4 / 40 4. What is the type of symbiosis where one organism benefits and the other organism is unaffected? Allelopathy Commensalism Parasitism Predation Mutualism 5 / 40 5. In terms of genetic variation, what does "balanced polymorphism" refer to? The presence of multiple copies of alleles in plant species The process of outbreeding in a population A high mutation rate within a population The maintenance of a variety of phenotypes within a population The combination of gametes in sexual reproduction 6 / 40 6. Which of the following correctly describes the process of capacitation in sperm cells? It is the process by which the sperm cell enters the zona pellucida of the egg cell It is the division of a sperm cell into two haploid cells It is the final maturation step for sperm prior to fertilization, triggered by secretions in the uterine wall It is the initial formation of sperm cells in the testes It is the process by which the sperm cell fuses with the egg cell during fertilization 7 / 40 7. In the context of birth control pills, how does the release of synthetic estrogen and progesterone prevent pregnancy? By causing a rapid LH spike leading to ovulation. By inhibiting GnRH production during the menstrual cycle through negative feedback. By stimulating the formation of corpus luteum. By promoting the development of follicles in the ovary. By causing uterine contractions which propel sperm. 8 / 40 8. What are the three possible shapes for epithelial cells? Squamous, cuboidal, and columnar Columnar, cuboidal, and spherical Rhomboidal, squamous, and cuboidal Cuboidal, hexagonal, and pyramidal Cuboidal, squamous, and trapezoidal 9 / 40 9. What are the three layers of the integumentary system? Epidermis, endodermis, and hypodermis Epidermis, mesodermis, and endodermis Dermis, endodermis, and hypodermis Epidermis, dermis, and hypodermis Epidermis, dermis, and endothelium 10 / 40 10. Which hormone is produced by the adrenal cortex and increases salt and water reabsorption and potassium secretion in the distal tubules and collecting ducts? Aldosterone Atrial natriuretic peptide (ANP) Renin Angiotensin II Antidiuretic Hormone (ADH) 11 / 40 11. What is a key indicator of the health of the microbiome in the large intestine? The level of urea The level of glycogen The number of erythrocytes Bile acid metabolism The level of glucose 12 / 40 12. What is the primary function of bile in the digestive process? It emulsifies fats, aiding in their absorption. It stimulates the secretion of digestive enzymes from the pancreas. It breaks down proteins into amino acids. It facilitates mechanical digestion by helping to churn food in the stomach. It neutralizes stomach acid to prevent damage to the small intestine. 13 / 40 13. Which of the following hormones is secreted by the parafollicular cells in the thyroid gland? Thyroxine (T4) Thyroid-stimulating hormone (TSH) Parathyroid hormone (PTH) Calcitonin Triiodothyronine (T3) 14 / 40 14. Which of the following hormones are derived from cholesterol? None of the above Amino-acid derived hormones Peptide hormones All of the above Steroid hormones 15 / 40 15. Which of the following statements is true regarding fibrous connective tissue? It has a matrix made up of fibers. It is located between cortical and cancellous bone. It is maintained and repaired by osteoblasts. It is vascularized and innervated. It provides support and stability to joints. 16 / 40 16. What structure quickens the propagation of action potentials on the muscle fiber? Myofibrils Troponin T-tubules Acetylcholine Sarcomeres 17 / 40 17. What is the purpose of the sarcoplasmic reticulum in muscle fibers? To release stored calcium ions into the sarcoplasm. To hold the myofilaments in place within the sarcomeres. To contract and shorten the sarcomeres. To allow ion exchange and electrical impulse propagation. To produce graded potentials on the muscle fibers. 18 / 40 18. Which of the following is NOT a component of the limbic system? Amygdala Medulla oblongata Hippocampus Hypothalamus Thalamus 19 / 40 19. Which glial cell type produces cerebrospinal fluid? Ependymal cells Schwann cells Astrocytes Microglial cells Oligodendrocytes 20 / 40 20. What is the function of memory B cells? To stimulate innate immunity To recognize self proteins To present antigens to T cells To produce and release antibodies To directly kill infected cells 21 / 40 21. Which of the following is true about myoglobin? It is a single peptide with one heme cofactor It has a lower affinity for oxygen than oxyhemoglobin It is found within erythrocytes It transports most of the oxygen traveling in the blood. It undergoes cooperativity 22 / 40 22. What is the minimum amount of air that needs to be present in the lungs to prevent collapse? Tidal volume Inspiratory reserve volume Functional residual capacity. Expiratory reserve volume Residual volume 23 / 40 23. What is the role of oncotic pressure in the capillaries? Pushes fluid out of the capillaries on the arterial end Filters lymph through lymph nodes Collects interstitial fluid, bacteria, fats, and proteins Brings fluid back into the capillaries at the venule end Propels lymph via peristalsis 24 / 40 24. Which of the following is true regarding invertebrate circulation? All of the above are false Arthropods have a closed circulatory system All invertebrates use a simple diffusion system to distribute nutrients Earthworms have an open circulatory system Echinoderms use an open circulatory system 25 / 40 25. Which of the following is true about gymnosperms? Their sperm is dispersed in seeds by wind. Their seeds are protected. They have independent gametophyte and sporophyte life-cycles. They are the most abundant type of plant. They have flagellated sperm. 26 / 40 26. Which characteristic is unique to the phylum Mollusca? Tube feet Radula Cnidocytes Metamorphosis Segmentation 27 / 40 27. What is the primary feature that distinguishes the three domains of life: Archaea, Bacteria, and Eukarya? Their metabolic processes Their ability to reproduce Their cell structure Their ability to produce spores Their size 28 / 40 28. What is the primary goal of fluorescence recovery after photobleaching (FRAP)? To identify the localization of proteins of interest. To measure the movement of biomolecules in a live cell. To measure the fluorescence lifetime of a cell. To identify the function of a gene. To increase the concentration of solute in a solution. 29 / 40 29. What type of microscopy is capable of visualizing fluorescent objects and reduces artifacts by focusing a beam of UV light onto the sample? Fluorescence microscopy Electron microscopy Optical microscopy Phase contrast microscopy Confocal laser scanning microscopy 30 / 40 30. What is a haplotype? A group of genes that are inherited from both parents. A group of genes that are inherited separately because they are located on different chromosomes. A group of genes that are not inherited. A group of genes that are inherited from one parent. A group of genes that are usually inherited together because they are located in close proximity to each other. 31 / 40 31. What is the role of telomerase in DNA replication? It unzips the DNA strands. It adds RNA primers at the origin of replication. It replaces RNA primers with DNA. It extends telomeres to prevent DNA loss. It binds to uncoiled DNA strands to prevent reattachment. 32 / 40 32. In prokaryotic transcription, how does a termination sequence end the transcription process in Rho independent termination? It adds a sigma factor to the RNA polymerase. It binds to the promoter region, stopping transcription. It binds to the RNA polymerase, causing it to fall off. The RNA transcript folds into a hairpin loop, causing the RNA polymerase to fall off. It causes supercoiling in the DNA strand. 33 / 40 33. How many pairs of autosomes are present in the human body? 46 pairs 22 pairs 2 pairs 1 pair 23 pairs 34 / 40 34. What is the term for the division of the nucleus? Dyads Cytokinesis Centromeres Ploidy Karyokinesis 35 / 40 35. What is the main difference between heterotrophs and autotrophs? There is no difference between heterotrophs and autotrophs. Autotrophs use cellular respiration, while heterotrophs use photosynthesis. Autotrophs can make their own food, while heterotrophs must get energy from the food they eat. Heterotrophs can make their own food, while autotrophs get energy from the food they eat. Heterotrophs use photosynthesis, while autotrophs use cellular respiration. 36 / 40 36. Where does beta-oxidation of free fatty acids occur in eukaryotic cells? Nucleus Endoplasmic reticulum Mitochondrial matrix Golgi apparatus Cytosol 37 / 40 37. Which of the following is not evidence supporting the endosymbiotic theory? Mitochondria and chloroplasts are similar in size. Mitochondria and chloroplasts have the same number of ribosomes. Mitochondria and chloroplasts contain a double membrane. Mitochondria and chloroplasts possess their own circular DNA. Mitochondria and chloroplasts reproduce independently of the host cell. 38 / 40 38. Which organelle is responsible for synthesizing lipids, producing steroid hormones, and detoxifying cells? Peroxisomes Lysosomes Rough endoplasmic reticulum Smooth endoplasmic reticulum Mitochondria 39 / 40 39. Which of the following statements correctly describes the role of cholesterol in the cell membrane? It is used by cells to recognize other cells. It binds to receptors and activates a target function. It attaches cells to other cells. It transmits signals all the way through the lipid bilayer. It makes the membrane less fluid at high temperatures and less fluid at low temperatures. 40 / 40 40. Which type of bond is formed between two monosaccharides to form a disaccharide? Intramolecular bond Covalent bond Hydrogen bond Intermolecular bond Ionic bond Your score is LinkedIn Facebook Twitter Restart quiz How did you find this practice test? Your feedback is appreciated Send feedback