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