Translation requires only mRNA. only a functional ribosome and amino acids. mRNA, tRNA, amino acids and ribosomes. only DNA.
Multiple Choice 1 point After DNA replication of a bacterial chromosome, the new DNA contains: 2 newly synthesized strands of DNA copied from the original parent strands one strand of parent DNA along with one newly synthesized strand small segments of parent DNA interspersed with newly synthesized segments of DNA two of the above
When referring to cell division, oncogenes are most like __ while tumor suppressor genes are most like __ the brakes on a car; the steering wheel on a car the gas pedal on a car; the brakes on a car the brakes on a car; the gas pedal on a car the steering wheel on a car; the gas pedal on a car
What is an important distinction between lymphatic tissues and lymphatic organs? Lymphatic organs have a connective tissue capsulé, but it is not definitive. Lymphatic tissue is always a dense mass of lymphocytes and macrophages. All lymphatic organs are loosely organized. Lymphatic organs are a well defined structure with a connective tissue capsule.
What type of immune cell is responsible for producing antibodies?
Which of the following valves connects the pulmonary trunk to the right ventricle? Pulmonary valve Aortic valve Mitral (bicuspid) valve Tricuspid valve
What is the growth rate of a population whose size is equal to the carrying capacity? C zero increasing fluctuating decreasing
Fill in the Blank Question A protein produced by certain white blood cells and tissue cells, that can target viruses, bacteria, and turnor cells, is square
4) What is your control setup for the bottom choice chamber? A. I will leave both sides empty. B. I will put sand on one side and leave the other side empty. C. I will put cornstarch on one side and fine sand on the other side. D. I will put sand on both sides. E. I will put cornstarch on both sides.
Tissue found inside bones which is the site of all blood cell differentiation and maturation of blymphocytes is called: interstitial fluid osteocytes periosteum bone marrow
Which of the following types of cells is most responsible for responding to color? Rods Ganglion cells Bipolar cells Cones Optic nerve
Select the correct statement regarding chemical synapses. Neurotransmitter receptors are located on the axons terminals of cells. The synaptic cleft uses the action potential to transmit a chemical signal to the postsynaptic cell. Cells with gap junctions use chemical synapses. The release of neurotransmitter molecules gives cells the property of being electrically coupled.
The __ is a capillary network that produces a blood filtrate that enters the urinary tubules. glomerulus vasa recta interlobar capillary peritubular capillary
Movement of sodium ions into the muscle cell at the neuromuscular junction causes __ A. Repolarization of the muscle cell membrane B. Depolarization of the muscle cell membrane C. Re-uptake of acetylcholine D. Release of acetylcholine
The neurotransmitters dopamine and serotonin are associated with which emotion? fear joy anger
The movement of molecules and ions from the peritubular capillaries into interstitial fluid and then into the nephron tubule iscalled __ a. secretion b. reabsorption c. excretion d. filtration
B lymphocytes are directly responsible for cell-mediated immunity. Select one: True False
In the sequence of events for inspiration, what step happens immediately after contraction of the inspiratory muscles? Air flows into the lungs Intrapulmonary volume increases Thoracic cavity volume increases Intrapulmonary pressure decreases IDONT KNOWYET
Multiple Choice Question Select the statements that best describes the relationship between genes and chromosomes. Genes are variations of chromosomes and can change the structure of the protein product. Genes are composed of long strands of DNA organized into chromosomes. Chromosomes are composed of long strands of DNA organized into chunks called genes. Chromosomes break down to form genes during meiosis so that the genes can be easily separated during gamete formation.
Which cells secrete parathyroid hormone in the parathyroid gland? Hematopoietic cells Chief cells Parietal cells Follicular cells
