Biology question and answers for May 07, 2024
- Q Pepsin is a digestive enzyme that Ois denatured and rendered inactive in solutions with low pH Ois manufactured by the pancreas Obegins the hydrolysis of proteins in the stomach helps...
- Q In the legs of Canada geese counter current exchange is occurring Which two substances are moving opposite one another Oblood in veins and blood in arteries Oblood in arteries and...
- Q stomach achea and esophagus both connect to the small intestine Opharynx Olarge intestine Orectum Question 16 1 point 4 Listen
- Q A mouse compared to an elephant has a lower metabolic rate per gram a larger surface area to volume ratio more rapid heat loss from the body surface little ability...
- Q a typical nerve cell the nucleus is found in the Ocell body O synapse axonal region dendritic region synaptic terminals Question 11 1 point B
- Q Which tissue type in the body contains cells with the unique ability to shorten adipose tissue epithelial tissue nervous tissue O connective tissue muscle tissue O Question 12 1 point...
- Q The nourishment insulation and support for neurons is the result of activity by the intercalated disks endocrine system adipose tissue Oglial cells smooth muscles Question 10 1 point Listen
- Q Panting by an overheated dog achieves cooling by evaporation shivering thermogenesis torpor O acclimatization nonshivering thermogenesis Question 9 1 point
- Q size increases in animals Omigration to tropical areas becomes necessary for thermoregulation there is greater variability in metabolic rate it becomes easier to conserve body warmth in cold environments reproduction...
- Q As body size decreases in animals there is greater variability in metabolic rate Oit becomes easier to conserve body warmth in cold environments migration to tropical areas becomes necessary for...
- Q Listen How do the microvilli on the absorptive epithelia of the small intestine enhance nutrient absorption Othey help protect the intestinal lining from abrasion Othey pump wastes into the lumen...
- Q ase the effectiveness of exchange surfaces lining the lungs and the intestines evolutionary pressures have increased the volume of the cells in these linings increased the number of cell layers...
- Q This drug in the picture can treat Fever Epilepsy Cancer arrhythmia HO N N
- Q FRET was used to study the interaction between 2 molecules Fluorophores used were Cyan Fluorescent Protein CFP and Yellow Fluorescent Protein YFP CFP absorbs 430nm light and emits 500nm light...
- Q More Positive Double the concentration of K outside the cell Double the number of K leak channels Decrease the concentration of Nat outside the cell by half More Negative Double...
- Q Match the words in the left column to the appropriate phrases on the right Make certain each word is matched with a phrase before submitting your answer View Available Hint...
- Q Match the area of the brain with its function 100 thalamus cerebral cortex cerebellum medulla oblongata 1 2 3 4 fine tunes motor activity to provide precise coordinated movements autonomic...
- Q The adult brain regions consist of all of the following except neural tube diencephalon cerebral hemispheres cerebellum brain stem
- Q the available space True False Question 2 1 point 4 Listen The adult brain regions consist of all of the following except neural tube diencephalon cerebral hemispheres ng membranous skull...
- Q Which area of the brain is crucial in regulating homeostasis hypothalamus cerebellum thalamus
- Q are incoming short distance signals on dendrites or the cell body vs outgoing long distance signals on axons Presynaptic potentials postsynaptic potentials Action potentials graded potentials EPSP IPSP Graded potentials...
- Q If a neurotransmitter binding to its receptor opens Cl channels which of the following would occur an EPSP an action potential presynaptic inhibition an IPSD
- Q Match the glial cells to their correct description Small ovoid cells that can transform into macrophages to phagocytize microorganisms and debris 10 Versatile star shaped cells that support and brace...
- Q Neurons can potentially live and function optimally for 100 years or more True False
- Q True False Question 3 1 point 4 Listen are incoming short distance signals on dendrites or the cell body vs outgoing long distance signals on axons Graded potentials action potentials...
- Q Match the glial cells to their correct description Form myelin sheaths are thicker nerve fibers in the CNS Cells that line the central cavities of the brain and spinal cord...
- Q The function of a neurotransmitter is determined by the receptor to which it binds True False
- Q When input travels along one pathway to a specific destination and produces a specific anticipated response that is a reverberating circuit parallel processing a simple neuronal pool serial processing
- Q following would occur an EPSP presynaptic inhibition an IPSP an action potential Question 7 1 point Listen to its receptor opens Cl channels which of the The function of a...
- Q the frequency of action potentials the duration of the action potentials the speed of the action potentials the strength of the action potentials Question 5 1 point Listen Multiple Sclerosis...
- Q Researchers found a strain of E coli bacteria that had mutation rates one hundred times higher than normal Which of the following statements correctly describes the most likely cause of...
- Q How is plant cell cytokinesis different from animal cell cytokinesis The contractile filaments found in plant cells are structures composed of carbohydrates the cleavage furrow in animal cells is composed...
- Q A black guinea pig crossed with a guinea pig with albinism produced 12 black offspring When the albino was crossed with a second black animal six blacks and six albinos...
- Q Most repressor proteins are allosteric Which of the following molecules binds with the repressor to alter its conformation and therefore affect its function O promoter CAMP transcription factor
- Q Starting with a fertilized egg zygote a series of six cell divisions would produce an early embryo with how many cells 32 12 16 64
- Q Albinism is a recessive trait A man and woman both show normal pigmentation but both have one parent who has albinism without melanin pigmentation What is the probability that their...
- Q When taken up by a cell which of the following molecules binds to a repressor so that the repressor no longer binds to the operator Opromoter Orepressor Ocorepressor
- Q What is meant by the description antiparallel regarding the two strands that make up the DNA double helix The double helix structure of DNA creates nonparallel strands Base pairings create...
- Q In yeast signal transduction a yeast cell releases a mating factor which diffuses through the membranes of distant cells causing them to produce factors that initiate long distance migrations binds...
- Q Not all intercellular signals require transduction Which one of the following signals would be processed without transduction a signal that is weakly bound to a nucleotide a lipid soluble signal...
- Q A triploid cell contains three sets of homologous chromosomes If a cell of a diploid species that normally has 42 chromosomes per cell is triploid this cell would be expected...
- Q At which phase of the cell cycle do centrioles begin to move apart in animal cells Otelophase anaphase metaphase prophase
- Q What is a primary function of transcription factors They regulate the release of calcium from the endoplasmic reticulum They convert ATP into CAMP They control gene expression They regulate the...
- Q Certain cell types normally have several nuclei per cell How could such multinucleated cells be explained The cell had multiple S phases before it entered mitosis The cell underwent repeated...
- Q Mendel s law of independent assortment has its basis in which of the following events of meiosis I alignment of pairs of homologous chromosomes along the middle of the cell...
- Q What is the role of DNA ligase in the elongation of the lagging strand during DNA replication It synthesizes RNA nucleotides to make a primer It stabilizes the unwound parental...
- Q When a neuron responds to a particular neurotransmitter by opening gated ion channels the neurotransmitter is serving as which part of the signal pathway transducer Oresponse molecule relay molecule signal...
- Q Which of the following statements is true of a species that has a chromosome number of 2n 16 The species has 16 sets of chromosomes per cell A gamete from...
- Q In which of the following ways do plant hormones differ from hormones in animals Plant hormones commonly travel through the soil from one plant to another Animal hormones typically travel...
- Q Within a double stranded DNA molecule adenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine What is the significance of the structural arrangement It determines the...
- Q How does extracellular glucose inhibit transcription of the lac operon by strengthening the binding of the repressor to the operator O by inhibiting RNA polymerase from opening the strands of...
- Q The genetic code is essentially the same for all organisms From this one can logically assume which of the following statements to be true A gene from an organism can...
- Q In pea plants the tall phenotype is dominant to the dwarf phenotype If a heterozygous pea plant is crossed with a homozygous tall pea plant what is the probability that...
- Q For each of the following indicate whether the condition will cause the membrane potential to become more positive more negative or largely unchanged when compared to the normal physiological resting...
- Q The individual with genotype AaBbCCDdEE can make many kinds of gametes Which of the following correctly describes why this situation is possible different possible assortment of chromosomes into gametes occurs...
- Q Listen In E coli there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication Which of the following events...
- Q Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis l The cells are haploid and the chromosomes are each composed of two...
- Q FtsZ is a bacterial cytoskeletal protein that forms a contractile ring involved in binary fission Its function is analogous to the cell plate of eukaryotic plant cells O the mitotic...
- Q In a diploid cell with 5 chromosome pairs 2n 10 how many centromeres will be found in a nucleus at G2 of the cell division cycle 40 20 5 10
- Q Which of the following statements supports the one gene one enzyme hypothesis A mutation in a single gene can result in a defective protein Multiple antibody genes can code for...
- Q Which of the following events happens at the conclusion of meiosis l Four daughter cells are formed Homologous chromosomes of a pair are separated from each other Sister chromatids are...
- Q In what way do kinetochore microtubules facilitate the process of splitting the centromeres They use motor proteins to hydrolyze the centromere at specific arginine residues They slide past each other...
- Q Which of the following processes might produce a human zygote with 45 chromosomes failure of the egg nucleus to be fertilized by the sperm failure of an egg to complete...
- Q How do cells at the completion of meiosis compare with cells that are in prophase of meiosis l The cells have half the amount of cytoplasm and twice the amount...
- Q During which of the following processes do sister chromatids separate from each other during meiosis I only during both mitosis and meiosis I during meiosis II only during both mitosis...
- Q Which of the following processes occurs in meiosis but not in mitosis synapsis of chromosomes chromosome replication alignment of chromosomes at the equator condensation of chromosomes
- Q What is the function of the enzyme topoisomerase in DNA replication elongating new DNA at a replication fork by adding nucleotides to the existing chain building RNA primers using the...
- Q Which of the following statements correctly describes the primary difference between enhancers and proximal control elements Enhancers improve transcription proximal control elements inhibit transcription Enhancers are DNA sequences proximal control...
- Q Metaphase is characterized by O separation of the centromeres alignment of chromosomes on the equator of the cell of sister chromatids Oseparation cytokinesis
- Q Why does testosterone a lipid soluble signaling molecule that crosses the membranes of all cells affect only target cells Intracellular receptors for testosterone are present only in target cells Only...
- Q Yeast cells of mating type a are genetically engineered to produce only mating factor a instead of the normal mating factor a The gene for the mating factor receptor was...
- Q What role do phosphatases play in signal transduction pathways They inactivate protein kinases to turn off signal transduction They amplify the second messenger CAMP O They transfer a phosphate group...
- Q Which of the following processes would result from a mutation that deactivates a regulatory gene of a repressible operon in an E coli cell complete inhibition of transcription of the...
- Q Which of the following statements describes the process of transformation in bacteria A strand of DNA is created from an RNA molecule External DNA is taken into a cell becoming...
- Q What is the function of the release factor during translation in eukaryotes It releases the ribosome from the ER to allow polypeptides into the cytosol It releases the amino acid...
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