Q: Crossing over occurs during tetrad formation (synapsis) during prophase I.
A: Meiosis is a reductional division that leads to the formation of four genetically unidentical…
Q: Explain the difference between positive regulation of the cell cycle and negative regulation of the…
A: At various times, the progression of cells through the cell cycle is regulated by different…
Q: What are spindle pole bodies.
A: SPBs is the abbreviated form of Spindle pole bodies that are found in fungi.
Q: Biology what specific signaling pathway is involved in priming the D/V axis and what cells are…
A: Insects are unique model species for studying human illnesses and determining medication sensitivity…
Q: Spindle fibres first start to form during a) telophase. b) anaphase. c) metaphase. d)…
A: Cell division occurs when a parent cell divides and forms two or more cells known as daughter cells.…
Q: Based on this information, is the pea aphid a true autotroph?
A: A true autotrophs is usually a green plant which contains chlorophyll that is cable of synthesizing…
Q: What is shrinkage state ?
A: To describe: To describe shrinkage state and the process involved in it.
Q: Loss of function mutation results in a _ allele.
A: Mutations are sudden changes in the gene sequence. When these changes causes loss of function of an…
Q: Illustrate the prophase 2
A: Introduction: In meiosis, a single cell undergoes the process of division twice and result in the…
Q: Why Mules Are Sterile?
A: A mule is the offspring of a male jackass and a mare. mares and jackasses are different species,…
Q: A. HCIO4 and NaCIO4 B. HNO2 and NANO2 C. HCN and NaCN D. NH3 and (NH4)2SO4
A: Option (a) cannot produce a buffer.
Q: Why is it important for chromosomes to be copied before cell divisions
A: Chromosomes are long thread-like structures that are located in the nucleus and carry coded genetic…
Q: explain Cohesin action in mitosis and meiosis
A: Cohesin refers to a multi-protein complex that controls the division of sister chromatids during…
Q: Cleavage furrow formed during cytokinesis is found in? A-both in animal and plants B- neither in…
A: Cytokinesis ensures correct partitioning of nuclear and cytoplasmic contents into separate daughter…
Q: explain Role of telomere in disease give a diagram
A: A telomere is a region at the ends of linear chromosomes that contains repeating nucleotide…
Q: Prophase II [ Choose ] Telophase II [ Choose ] Anaphase I [ Choose ] Metaphase II| [ Choose ] > >
A: Meiosis
Q: Name the signal which helps protein to move in or out of the nucleus?a) Notch signalb) Paracrine…
A: Proteins are macromolecules formed by long chain of amino acids. They are involved in a vast array…
Q: What is the Bounding step?
A: There are many ways to strengthen the different part of the body. With exercises, we use a different…
Q: Which letter in the diagram below is pointing to the anticodon
A: A trinucleotide sequence that is complementary to a corresponding codon in a messenger RNA sequence…
Q: why anaphase I is important?
A: Anaphase1 is the third stage during meiosis 1 after the completion prophase1 and metaphase1 .…
Q: What is the CDK of Intra S-phase checkpoint? a.)Present b.)Absent
A: The primary G1/S cell cycle checkpoint controls the commitment of eukaryotic cells to transition…
Q: // Which CDK and cyclin does p53 ultimately target in DNA damaged conditions? O CDK1/cyclin E O…
A: CDK phosphorylate soecific target proteins. They required cyclin to be activate. CDK-cyclin…
Q: Is the CDK present in G2 checkpoint?
A: Various checkpoints control the cell cycle..
Q: Which factor binds to the C3 convertase to form the C5 convertase for all three pathways A. C3a…
A: Compliment system is the way to destroy antigen by activating some compliment protein found in the…
Q: is/are meristematic? -
A: INTRODUCTION Because plants are stationary, they have been given tissues made up of dead cells that…
Q: Which of the following is an accurate model and description of anaphase IIII in Cape parrots?
A: Answer :- As per the Karyotype of the somatic cells from the cape parrots obtained, they have total…
Q: Anaphase B involves the separation of spindle poles. What forces have been proposed to drive this…
A: Anaphase is the third stage, followed by metaphase that is characterized by the seperation of…
Q: How does a signal that binds to the surface of the cell reach all the way to the nucleus? is this…
A: Signal receptor: A signal molecule must bind to its receptors to initiate a response.
Q: Explain, using examples, how a farmer might choose an appropriate bull to inseminate their cow.
A: Bulls are the biggest proportion of the calf crop genetics,so it is necessary to select a herd sire…
Q: What is the main difference between cytokinesis in plants and animals?
A: A single parent cell can divide to form daughter cells, either by the process of meiosis or mitosis.…
Q: Which honeybee in Figure 21.4 (the worker or the queen) will have more copies of 5-methylcytosine in…
A: In honeybees, the nutritional privileges lead to two different developmental forms, the queen and…
Q: describe origin of transfer
A:
Q: What is induction?
A: Cell is a basic membrane-bound unit and it is often called as the basic building blocks of all…
Q: Complex I and Complex II produce a common product which is: reduced cyt. c. FAD.
A: The electron transport chain (ETC) is a series of electron transporters embedded in the inner…
Q: The p53 protein regulates the expression of BAX and Bcl2 to keep division at normal rate. Explain…
A: The p53 gene codes for p53 protein which regulates the expression of BAX and Bcl2 to keep cell…
Q: What would be the effect of a drug that inhibited the breakdown of cyclin B?
A: The cell cycle is a series of events through which cells divide and produce daughter cells. It is…
Q: Is it true that the cell cycle is regulated very tightly?
A: Introduction The events that occur in a cell prior to cell division are referred to as the cell…
Q: What types of genes would you expect to be constitutive?
A: Gene expression is the process by which information present in the genes are used for making the…
Q: Cells express different genes in response to a. internal triggers and external signals b.…
A: Gene regulation is the process by which a cell determines which of the numerous genes in its genome…
Q: During cytokinesis, a _________________ pulls the cell surface inward, thereby forming a…
A: There are two types of cell division, mitosis, and meiosis. Mitosis occurs in somatic cells, and…
Q: xplain the purpose of the O+ cells in the reverse grouping. In what circumstances would you expect…
A: Blood grouping is usually done for ABO and Rh systems and thus 8 blood groups are commonly…
Q: Explain about Cri du Chat Syndrome in Humans ?
A: The disease is caused when there is a deviation from the normal occurs. Diseases can be communicable…
Q: In your response, you should explain what type and kind of cells are being produced? You should…
A: ANS: Meiosis is a process where a single cell divides twice to produce four cells containing half…
Q: Which part of the AK rules with the effector cell ? Select one . A. Fc region B .Sugar chains c.…
A: In the immune system, effector cells are the relatively short-lived activated cells that defend the…
Q: The molecular tether that links sister chromatids of a duplicated chromosome to each other is (a)…
A:
Q: Gen
A: Chromosomes are thread-like structures located inside the nucleus of cell. Each chromosome is made…
Q: what are crossover suppressors.
A: Crossing over is the process during which the chromosomal segments of two non-sister chromatids are…
Q: xplain the process of C3 in plants
A: Photosynthesis is the mechanism through which green plants and algae receive nutrients. This process…
Q: Which processes regulates yeast budding? O A. DNA replication O B. inhibition of spindle formation
A: Budding is an asexual form of reproduction where an outgrowth formed by cell division in any part of…
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- Gap Junctions are found at synapses Fill in the blank A.Chemical B. ElectricalA channel opens on a postsynaptic membrane thatcauses a negative ion to enter the cell. What type of gradedpotential is this?a. depolarizingb. repolarizingc. hyperpolarizingd. non-polarizingRepolarization of an axon during an action potential is produced by a. inward diffusion of Na+. b. active extrusion of K+. c. outward diffusion of K+. d. inward active transport of Na+.
- The change in the electrical balance between the intra- and extra-cellular fluid that occurs when a neuron sends a message is called the _________________ potential. action resting electrical synapticSynaptic transmission is inhibited by all the following, except :-a- oxygen lackb- alkalosisc- acidosisd- prolonged activity of synapseAn influx of positive sodium ions eventually causes closing of the inactivation gates of voltage regulated sodium channels, stopping the influx of positive sodium ions, and thus the final stages of an action potential are regulated by _____ feedback.
- An influx of positive sodium ions causes opening of the activation gates of voltage regulated sodium channels resulting in a further influx of positive sodium ions, and thus the initial stages of an action potential are regulated by ______ feedback.All of the following are directly involved in synaptic transmission excepta. voltage-sensitive ion channels on the postsynaptic membraneb. chemical-sensitive ion channels on the postsynaptic membranec. Ca2+d. neurotransmittersWhat happens to sodium channels and potassium channels during repolarization of a neuron? both potassium channels and sodium channels remain closed the sodium channels close, followed by opening of the potassium channels both sodium channels and potassium channels remain closed the sodium channels open, but the potassium channels remain closed both potassium channels and sodium channels remain open
- Which of the following occurs during synaptic transmission? Select ALL that apply A) vesicles filled with neurotransmitter are released into the synapse B) an action potential travels through a neuron like a wave C) neurotransmitter binds to receptors on the sending neuron D) neurotransmitter binding to a receptor triggers the opening of an ion channel E) ions enter the receiving neuron's dendritesDraw a presynaptic and postsynaptic neuron at to demonstrate the release and acceptance of a neurotransmitter. Identify the following in your drawing: Ca2+, synaptic cleft, receptor, synaptic vessicle, SNARE, presynaptic neuron, postsynaptic neuronAt rest, a neuron has a lower concentration of sodium than the surrounding fluid. The neuron also has a higher concentration of potassium inside the cell. The sodium-potassium ion pump is used to maintain the neuron in the resting state. Which of the following statements is true? A. Remaining at rest requires the use of ATP. B. Remaining at rest requires an input of sodium. C. Remaining at rest requires the activation of cotransporters. D Remaining at rest requires decreased permeability of the membrane.
