Biology question and answers for May 07, 2024
- Q A signal transmitted via phosphorylation of a series of proteins is generally associated with which of the following events O production of ATP in the process of signal transduction activation...
- Q During which phase of mitosis do the chromatids become chromosomes Ometaphase prophase anaphase telophase
- Q What is the name of the microtubule organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle centromere O centriole kinetochore centrosome
- Q Eukaryotic chromosomes are composed of which of the following macromolecules ODNA and RNA ODNA and proteins DNA and phospholipids ODNA only
- Q How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE 64 16
- Q Which of the following statements correctly explains the fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment All of the genes...
- Q Listen Why did all of the F offspring of Mendel s classic pea cross always look like one of the two parental varieties The traits blended together during fertilization Each...
- Q Which of the following statements accurately describes the differences between DNA replication in prokaryotes and DNA replication in eukaryotes Prokaryotes produce Okazaki fragments during DNA replication but eukaryotes do not...
- Q The receptors for steroid hormones are located inside the cell instead of the membrane surface like most other signal receptors How do steroids gain access to their receptors Steroid hormones...
- Q What does it mean to say that a signal is transduced O The signal is amplified such that even one signal mol cule evokes a large response O The physical...
- Q Which of the following processes would allow the detection of alternative splicing of transcripts from a given gene Compare the sequences of different mRNAs made from the given gene Compare...
- Q Under what conditions does the trp repressor block transcription of the trp operon when the repressor is not bound to tryptophan when the repressor is not bound to the operator...
- Q Gray seed color in peas is dominant to white Assume that Mendel conducted a series of experiments where plants with gray seeds were crossed among themselves and the following progeny...
- Q The genetic code is redundant What is meant by this statement A single codon can specify the addition of more than one amino acid More than one codon can specify...
- Q 4 Next kinetic studies were carried out with the enzymes A plot of velocity vs phenylalanine concentration yields a sigmoidally shaped curve What does this tell you about the enzyme
- Q 5 Kinetic data in which PAH activity is compared with and without preincubation with phenylalanine is shown in Figure 30 3 Give a structural basis for the interpretation of these...
- Q H N CH 01 phenylalanine CH phenylpyruvate 02 tissue protein phenylalanine hydroxylase H 0 BHA NADH H dietary protein NAD melanin epinephrine H N CH Phenylketonuria tyrosine CH OH thyroxine...
- Q 10 The cause for the mental retardation associated with untreated PKU is not completely understood but it is believed to arise from the high concentration of phenylpyruvate which is a...
- Q Which of the following mechanisms is used to coordinate the expression of multiple related genes in eukaryotic cells OA given gene may have multiple enhancers but each enhancer is generally...
- Q A couple has a child with Down syndrome The mother is 39 years old at the time of delivery Which of the following is the most probable cause of the...
- Q Which of the following effects might be caused by reduced or very little active telomerase activity Cells may become cancerous Cells maintain normal functioning Telomere lengthens in germ cells Cells...
- Q Listen What type of synovial joint is labeled as 6 and what is its range of motion 1 3 5 P inint Nonaxial 2 4 6
- Q What structure is labeled as 1 5 7 8 Postsynaptic membrane T tubule Presynaptic membrane Acetylcholine receptor Potassium Acetylcholinesterase Axon terminal Synaptic vesicle Calcium Synaptic cleft Sodium Acetylcholine 6030 2...
- Q A motor unit is A a group of linked muscle cells OB a period of time during muscle contraction C all the axons of nerve cells that innervate a muscle...
- Q A superficial muscle of the leg this one dorsiflexes the foot OA fibularis longus B gastrocnemius C soleus D tibialis anterior
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