Q: which of the following macromolecules enter the nucleus of a eukaryotic cell through pores in the nu...
A: Introduction:A nuclear membrane is a double membrane that surrounds and protects the nucleus of a ce...
Q: Epithelium-Mesenchyme transitions (MET or EMT) are crucial morphogenetic events occurring during gas...
A: During EMT transition there is loss of cell polarity as well as adhesion property of epithelial cel...
Q: Statement 1: A genome refers to the complete genetic make-up of an organism. Statement 2: A large co...
A: cDNA library is a collection of cloned DNA sequences that are complementary to the mRNA extracted fr...
Q: we done an experiment where we extracted the DNA from strawberry, grape, and peas. With the strawber...
A: The ability to extract DNA is of essential significance to concentrate on the genetic reasons for il...
Q: Argue against the use of biotechnology ( genetically engineered food) as a solution to world hunger.
A: Introduction :- Biotechnology includes the studies , practical work , researches related to the use ...
Q: Which of the following correctly describes a possible scenario during a run of gel electrophoresis w...
A: Agarose Gel electrophoresis(AGE) is a method used in molecular biology to separate mixed RNA, DNA, o...
Q: Who could not have been the parents of baby Y? Babies Baby X Baby Y Baby Z Blood Types Blood type B ...
A: Human can be classified based on blood type in the individual and most commonly used is ABO and Rh t...
Q: Which of these REQUIRES active transport in order to cross the plasma membrane? A. a sodium ion movi...
A: Active transport Transport proteins within the membrane must use energy (ATP) to move the substance...
Q: somatic cell
A: somatic cell is cell of the body except sperm and egg cells. Somatic cells are diploid cell that is ...
Q: a Punnett square s
A: The Punnett square is a square diagram that is used to predict the genotypes of a particular cross o...
Q: Facilitated diffusion moves objects from... A. a LOWER concentration area to a HIGHER concentration ...
A: Water water soluble substances and gaseous components are transported across the cells by various ph...
Q: nich is ihcorrect abo dlabetes Beta cells of islets are not destroyed All are incorrect. The pancrea...
A: Answer : type 1 diabetes is a genetic disorder and appear early in the life . Beta cells of islets a...
Q: 3' -T ACATC T T G G C GAC GAC T-5' Mutated DNA Sequence #1: MRNA sequence? (Circle the change) Amino...
A: 1)DNA - 3'- TAC ACC TTG GCG ACG ACT-5' mRNA - 3'- AUG UAG AAC CGC TGC UGA-5' Amino acid sequence – M...
Q: The thermodynamic properties governing the surface tension between water molecules and the grains of...
A: Solution :: Developmental biology is about the study of embryo to adult formation from step to step ...
Q: Explain the difference between K-selected species and r-selected species. For each, provide an examp...
A: The r selected species include those animals that have a highly variable population and they produce...
Q: 29) The unicellular-photosynthetic flagellated cell, responsible for Red Tide Phenomenon are called:...
A: Red tide: it is usually a phenomenon of algal bloom. The microscopic algae increases their populatio...
Q: 5.What is wrong ? the cell is a. Of two types 5. prokaryotic cell has a big nucleus. E. Eukaryotic h...
A: Answer :: The cell All living organism or living thing that are composed of cells. The cell is also...
Q: wrist and ankle are type of Irregular bones O Long hollow bones O Cylindrical bones O Ribs O
A: ANSWER;-A) Irregular bones Explain;- Irregular bones are the type of wrist and ankle Short Bones Are...
Q: Considering the Polymerase Chain Reaction (PCR), we can state that: a) It is a technique that promo...
A: Answer - a) It is a technique that promotes linear amplification of the number of DNA molecules in a...
Q: What are the general reasons of animals' existence in each era: Cenozoic, Mesozoic, and Paleozoic?
A: Coenozoic --- It took a catastrophic event to rid the planet of dinosaurs. Luckily for mammals, the ...
Q: Many proteins are secreted in their inactive form. This is also true of many toxic proteins produced...
A: When a toxin is present in an inactive state, it causes no harm to the organism that produces it. Ba...
Q: How is synaptic transmission terminated in the synapse or at the terminal button?
A: ANSWER;- The neurotransmitter termination can happen in three ways. To start with, reuptake by astro...
Q: In pea plants, green pod color dominates yellow pod color. If a pea plant with yellow pods is crosse...
A: Homozygous Two alleles of a gene are identical (YY, yy). Heterozygous An individual having two diffe...
Q: How is polymerase chain reaction used as a diagnostic test for COVID-19? PCR serves as a molecular t...
A: Introduction:- The acronym PCR stands for polymerase chain reaction. It's a test that looks for gene...
Q: Selective breeding
A: Selective breeding involves choosing parents with particular characteristics to breed together and p...
Q: When the frequency of sitters is 0.75 (see Figure 6.22), the fitness of rovers is much higher than t...
A: The rovers are becoming a larger fraction of the whole population as their numbers grow in compariso...
Q: 1. Many enzymes help in cellular respiration. Using the figure to the right, explain the difference ...
A: Enzymes are the bio-catalyst which increases the rate of the reaction. It binds to the substrate and...
Q: What does the study of ethics encompass? Describe and differentiate instrumental value and intrinsic...
A: The study of ethics includes the study of good and evil, as well as rights and wrongs. The intrinsic...
Q: What is the function of NaCl in urine formation?
A: Urinary system involves in the clearing or filtering the blood and ridding of wastes that produced i...
Q: Regarding the production of recombinant monoclonal antibodies, it is CORRECT to state that: * (JUST ...
A: We know that antibodies are produced ordinarily by infection or immunization are polyclonal as natur...
Q: How do temperature affects enzyme functions?
A: Enzyme function depends upon various factors. One of the factors responsible for enzyme activity is ...
Q: It is a process occurring inside the body that is responsible for maintaining core temperature of th...
A: There are few important points which should be kept in mind: Temperature is important in controlling...
Q: what are chromosome bands and why are they important
A: Introduction Chromosome banding:chromosomal banding is defined as alternating light and dark patches...
Q: In your region, what species are threatened with extinction? Why are they vulnerable? Suggest steps ...
A: Extinction of plant or animal species can be considered a natural process. This process generally oc...
Q: 5) Cystic fibrosis is caused by a gene on chromosome 7 and results in the build-up of mucus in the l...
A: Cystic fibrosis or (CF)- it is an inherited disorder that leads to severe damage to digestive system...
Q: . Draw the melting curve for primer annealing, labeling the axes. Label the position of the annealin...
A:
Q: Why is genetic drift stronger in smaller than in larger populations?
A: Genetic drift is the change in gene pool of small population that takes place strictly by chance. It...
Q: Tetrad analysis in Neurospora is described in Tool Box 6.1. In Neurospora, ser-6 is locate d to the ...
A: Crossing over occurs during prophase I and involves the exchange of genetic material between homolog...
Q: 1. Why were nuclei being unstained when you used eosin? 2. What is the relationship between heteroch...
A: Answer 1- Eosin is a group of fluorescent acidic compounds that reacts with and forms salts with bas...
Q: Regarding the production of monoclonal antibodies, it is CORRECT to state that: * A) Hybridomas are ...
A: Hybridoma technology is used to produce monoclonal antibodies. Monoclonal antibodies are the types ...
Q: Thoroughly explain the difference between simple diffusion, facilitated diffusion, and active transp...
A: Simple diffusion is a type of passive transport which as the name suggests, is simply the unassisted...
Q: For a conservation biologist interested in sustaining populations of the organisms below, why would ...
A: A forest-breeding warbler that suffers poor nesting success in small, fragmented forest patches. Ha...
Q: o00 000 Epithelium-Mesenchyme transitions (MET or EMT) are crucial morphogenetic events occurring du...
A: Developmental biology describes how interacting mechanisms generate an organism's various size, form...
Q: Two methods for functionally inactivating a gene without altering the gene sequence involve dominant...
A: RNA interference, also known as RNA silencing, is a biological process that involves the involvement...
Q: The thermodynamic properties governing the surface tension between water molecules and the grains of...
A: Introduction :- Morphogenesis is a process which occurs during the embryological development of an o...
Q: Codons The genetic code consists of triplets of nucleotides called codons. Refer to the genetic cod...
A: Cells are the building blocks of life. They are the constituent structural and functional units of t...
Q: What do contractile vacuoles do? A. pump water out B. overfill the cell with water C. make acidic wa...
A: This question is about contractile vacuoles.
Q: On your OWN opinion, what do you think abo the GMO corn that is
A: An animal, plant, or microbe whose DNA has been altered using genetic engineering techniques is refe...
Q: Br Br CI
A:
Q: Find i ection Its
A: Results When searching for sweets, American tend to prefer milk choclate over other cocoa choices. ...
Step by step
Solved in 3 steps
- Botulism toxin inhibits the release of acetylcholine at the neuromuscular junctions. What effect does this have on the muscle activity? a. Muscles will contract continuously. b. Muscles will contract sporadically, without conscious control. c. Muscles will not contract because they will not receive nerve stimulation. d. There will be no effect on muscle activityWhat is the physiological mechanism that produces a quick and efficient skeletal muscle response to an external stimulus? A. voluntary motor commands from the brain B. temporal and spatial summation C. sensory nerve input to the brain D. spinal reflex arc E. endocrine secretory response35. Which of the following sentences is CORRECT? A. Intercalated disc is absent in smooth muscle and skeletal muscle B. The contraction of smooth muscle cells is slow, but they can remain contracted for long periods C. Cerebellar cortex is composed of outer molecular layer, central layer of Purkinje cells, and granule layer D. Ganglia are ovoid structures containing neuronal cell bodies and glial cells supported by connective tissue
- Which of the following statements relating to smooth muscle is true? a. single-unit smooth muscles contract rhythmically due to gap junctions b. multi-unit smooth muscles are arranged like skeletal muscle motor units c. visceral smooth muscles exhibit spontaneous action potentials d. multi-unit smooth muscles exhibit graded contractions in response to neural stimuli e. all of the aboveWhat might happen if skeletal muscle lacked tropomyosin? A. The striation pattern would disappear. B. Ca2+ levels in the muscle would decrease. C. Actin and myosin would not be able to form cross-bridges. D. Acetylcholine would not be released into the synaptic cleft. E. Myosin and actin would form cross-bridges whenever ATP is available.What do skeletal muscle contractions share in common with smooth muscle contractions?a. Both types of contractions do not require calcium ions for a contraction to occur.b. Both types of contractions generate little force or a weak force.c. Both types of contractions consume very little ATP.d. Both types of contractions result from thick and thin filaments sliding past one another.
- Which statement about striated skeletal muscle is true? A. The tension generated by a muscle is invariable. B. Mechanical summation of twitches in a muscle fiber leads to a graded increase in the tension that is above that generated by a single twitch. C. A single action potential arriving at the neuromuscular junction is not sufficient to cause a muscle fiber to twitch. D. Muscle twitches are able to mechanically sum when Ca2+ is quickly and completely removed from the sarcoplasm between action potentials. E. An action potential in the muscle cell activates contraction by releasing Na+ into the sarcoplasm.From which embryonic cell type does muscle tissuedevelop?a. ganglion cellsb. myotube cellsc. myoblast cellsd. satellite cellsWhich statement(s) about human neuromuscular innervation is/are true? A. A single spinal motor neuron innervates multiple muscle fibers. B. The majority muscle fibers are innervated by two or more motor neurons. C. Polyneuronal innervation of adult muscles fibers is possible, but rather rare. D. Each spinal motor neuron innervates a single skeletal muscle fiber.
- What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation? a. stimulation of ACh receptors b. diffusion of Na* back into transverse tubules c. return of Ca2+ into the sarcoplasmic reticulum d. breaking of the bond with tropomyosinWhat type of motor neuron stimulates skeletal muscle fibers to contract by the excitation-contraction mechanism? a. interneuron b. α-motor neuron c. γ-motor neuron d. upper motor neuronSkeletal muscle and cardiac muscle are similar in that both types of muscle a. have cells that branch. b. contain intercalated discs. c. are under involuntary control. d. are striated.