DNA and RNA are both composed of nucleotides. However, RNA has three key differences. Please select thethree items that are unique to RNA.
1.Double stranded 2.Single stranded 3.Contains the nitrogen base Uracil in place of Thymine 4.Backbone contains the sugar ribose 5.Backbone contains the sugar deoxyribose 6.Contains the nitrogen base Thymine in place of Uracil
Three items that are unique to RNA are as follows:
3. Contains the nitrogen base Uracil in place of Thymine.
4. Backbone contains the sugar ribose.
In general, which factor is NOT critical when beginning an exercise program?A. using appropriate protective equipment during exercise B. finding friends who like to exercise the same way you do C. seeing your doctor for a physical assessment prior to beginning exercise D. choosing clothing that is designed to match your exercise program Please select the best answer from the choices provided. Ο Α B OD
The non-critical factor when a person begin an exercise program is finding friends who like to exercise the same way you do.
Physical exercise is an ideal way to stay healthy. It is a personal activity that should be done in the best way and with a minimum risk. Finding friends who like to exercise can contribute to motivation, but it is not an indispensable element when establishing a personal exercise routine.
Since it is a personal activity that affects an individual's health, personal factors should be considered when establishing a exercise program.
Regarding the other options, which are important factors for the exercise :
Use appropriate protective equipment during exercise, allows to avoid injuries during physical activity.
See the doctor for a physical assessment prior to beginning exercise, establishing the state of health and physical condition appropriate for this activity.
Choose clothing that is designed to match your exercise program, which must be comfortable and light, allowing maximum performance to be achieved.
A large section of the lower troposphere with uniform temperature and humidity is called _______.A. a hurricane
B. a hemisphere
C. a pressure gradient
D. an air mass
D. an air mass
What are two main abiotic factors that affect organisms in marine ecosystems? A. Oxygen level and water temperature B. Predators and competition C. Salinity and water temperature D. Predators and food availability
dear user the answer is option A.oxygen level and water temperature and C.salinity and water temperature.
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It would be A
"Cystic fibrosis is a genetic disorder. Define what a genetic disorder is? Can you name two other genetic disorders?"
A genetic disorder is a disease that is caused by the change in the sequence of DNA. Down Syndrom and Huntington disease are two examples of genetic disorders.
A genetic disorder is a change in the sequence of the DNA that results in a disease or condition. These disorders are caused by the mutation of one or multiple genes, by damage in chromosomes, or by environmental factors.
Down syndrome is a known genetic disorder where there is an extra copy of chromosome 21 instead of the two copies. People with Down Syndrom have intellectual difficulties and a different physical complexion that can lead to some problems.
Huntington disease is a genetic disorder that causes the degeneration of neurons, which brings emotional, cognitive, and movement problems that worsen with time since it is a progressive disease.
In an experiment investigating the mechanism of protein secretion, researcherstracked the movement of radioactively labeled polypeptides in pancreatic cells. At various times after the labeling, samples of the cells were observed using an electron microscope to determine the location of the radioactively labeled polypeptides. Figure 1 summarizes the results at 5 minutes, 15 minutes, and 30 minutes. The dark dots in the figure represent the radioactively labeled polypeptides. Nucleus Golgi Secretory Vesicles Time 5 min ER 15 min 30 min Figure 1. Radioactively labeled polypeptides Using the experimental results, describe the pathway that secretory proteins take from their synthesis to their release from the cell. (3 Points)
First, the polypeptides are synthesised and folded in the endoplasmic reticulum, which is a series of folded membranes.
Then, the polypeptide is packaged into vesicles and moved into the Golgi apparatus, which are stacks of flattened sacs. At the Golgi apparatus, the polypeptide is modified, forming the final structure of the protein. The proteins are then packaged in to vesicles to be transported to their final destination outside of the cell.
The proteins are delivered outside the cell in vesicles via a process called exocytosis. The vesicles reach the membrane, fuse with the membrane, and are then delivered outside the cell.