Biology High School

RNAi is a very powerful potential therapeutic because: Select one: O a. Is readily available commercially O b. The people who discovered it won a Nobel Prize O c. It functions in the mitochondria O d. O e. It is easy to deliver to cells It can be used to turn off the expression of a specific gene Non-viral gene delivery systems are better than viral delivery systems because: Select one: O a. They are bigger than cells Ob. They can enhance the immune response directed towards the therapeutic gene Oc. They can be tailored to be non immunogenic Od. They are copying a system that is seen in nature О е. They can be altered genetically

Answers

Answer 1

It can be used to turn off the expression of a specific gene and  non viral gene delivery  can be tailored to be non-immunogenic . Therefore option (E) and (C) are correct.

Small RNA molecules, such as siRNA, can attach to target messenger RNA (mRNA) and impede its translation into protein, decreasing or suppressing gene expression. Targeted gene silencing makes RNAi a promising therapeutic tool.

Non-viral gene delivery systems can be made non-immunogenic. Viral vectors are commonly employed for gene transfer, however they can cause immunological reactions and safety problems. Non-viral delivery techniques can reduce immunological reactions, making them safer and better for therapeutic use.

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Related Questions

Question 6 of 10
A scientist is testing whether light color affects plant
growth. She places three groups of plants in boxes, each
with only one color of light: red, blue, or green. She places
a fourth group of plants in natural light. Each day she
measures the plants and records their growth.
What is the dependent variable in this experiment?
OA. The growth of the plants
OB. The color of light the plants received
OC. The plants in natural light
OD. The type of plants she used.

Answers

The dependent variable in this experiment is the growth of the plants. It is the variable that is being measured and is expected to change in response to the independent variable, which is the color of light the plants received. So, option A is the right choice.

The dependent variable is the outcome or response that is being measured or observed in an experiment. In this case, the scientist wants to determine whether light color affects plant growth. To investigate this, she manipulates the independent variable, which is the color of light, by placing different groups of plants in boxes with different colors of light: red, blue, green, and natural light.Each day, the scientist measures the plants' growth and records the data. By comparing the growth of the plants in different light colors to those in natural light, she can analyze the impact of light color on plant growth.The growth of the plants is the dependent variable because it is expected to change or vary depending on the different light colors the plants are exposed to.

Therefore, the dependent variable in this experiment is the growth of the plants.
The right answer is option A. The growth of the plants

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Seismic waves go faster through
S waves
than through

Answers

Seismic waves go faster through S waves than through P waves.

1. Seismic waves are waves of energy that travel through the Earth's interior, primarily generated by earthquakes or other geological disturbances.

2. There are two main types of seismic waves: P waves (primary waves) and S waves (secondary waves).

3. P waves are compressional waves that travel by compressing and expanding the material they pass through. They can travel through solids, liquids, and gases.

4. S waves, on the other hand, are shear waves that move particles perpendicular to the direction of wave propagation. They can only travel through solids.

5. The speed of seismic waves depends on the properties of the material they pass through. Generally, P waves travel faster than S waves.

6. However, when seismic waves encounter a boundary between different materials, their speeds can change. In some cases, S waves may travel faster than P waves through certain materials.

7. This phenomenon occurs because the elasticity and density of the materials affect the speed of the waves. The specific properties of the materials at a given location determine how seismic waves will propagate through them.

8. In most cases, S waves travel at about 60% to 70% of the speed of P waves. This speed difference is one of the factors that seismologists use to analyze seismic data and determine the nature of the Earth's interior.

9. By studying the arrival times and characteristics of P and S waves at different seismic stations, scientists can gain valuable insights into the structure and composition of the Earth's layers.

10. Therefore, it is accurate to state that seismic waves go faster through S waves than through P waves, as long as we consider their relative speeds within a specific material or medium.

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What can you tell me about the polarity of the xanthophylls compared to carotene? 8. What are the mobile and stationary phases in the chlorophyll TLC experiment? Why are the mobile and stationary phased named that way? 9. Many kinds of intermolecular forces cause organic molecules to bind to the adsorbent on a TLC plate. Rank the strengths of these interactions (use 1 for the WEAKEST; 4 for the STRONGEST). H-bonding van der Waals salt formation dipole-dipole

Answers

Xanthophylls are more polar than carotene due to oxygen-containing functional groups. In chlorophyll TLC, the mobile phase (nonpolar) carries the sample while the stationary phase (polar) remains fixed. Intermolecular forces ranking: van der Waals < dipole-dipole < hydrogen bonding < salt formation.

Xanthophylls are more polar than carotene. Xanthophylls contain oxygen-containing functional groups such as hydroxyl (-OH) and carbonyl (C=O) groups, which increase their polarity compared to carotene, which lacks these groups.

In the chlorophyll TLC (thin-layer chromatography) experiment, the mobile phase is typically a nonpolar solvent such as hexane, while the stationary phase is a polar adsorbent material coated on the TLC plate, such as silica gel or alumina. The mobile phase is named so because it moves or "migrates" up the TLC plate, carrying the sample components with it. The stationary phase remains fixed in its position, allowing separation of the components based on their affinity for the stationary phase.

Ranking the strengths of the intermolecular forces :

1. van der Waals forces: These forces arise from temporary fluctuations in electron density, resulting in weak attractions between molecules.

2. Dipole-dipole interactions: These interactions occur between polar molecules, where the positive end of one molecule is attracted to the negative end of another molecule.

3. Hydrogen bonding: This is a specific type of dipole-dipole interaction that occurs when a hydrogen atom is bonded to a highly electronegative atom (such as oxygen, nitrogen, or fluorine) and forms a weak bond with another electronegative atom.

4. Salt formation: This involves the formation of strong ionic bonds between positively and negatively charged species, resulting in a high level of interaction strength.

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Explain what could be the cause of the disease outbreak on Jason's farm and what preventative measures could be taken


In the past year Jason's farm has been wracked with disease thete was an outbreak of avian pox in the chicken coop that cost him 3 chickens, four pigs developed whip worms and two piglets came down with colibacillosis

Answers

The disease outbreak on Jason's farm could have several possible causes. One potential cause could be poor biosecurity measures. If there are gaps in the farm's biosecurity protocols, it can allow pathogens to enter the premises and spread among the animals. This could include factors such as inadequate sanitation practices, insufficient quarantine procedures for introducing new animals, or lack of proper isolation facilities for sick animals.

Another factor that could contribute to the disease outbreak is a compromised immune system in the animals. Stressful conditions, overcrowding, poor nutrition, or a lack of vaccination protocols can weaken the immune response of the animals, making them more susceptible to diseases.

To prevent future disease outbreaks on Jason's farm, several preventative measures can be implemented. Firstly, improving biosecurity practices is crucial. This includes implementing strict sanitation procedures, establishing proper quarantine measures for new animals, and ensuring that sick animals are isolated promptly.

Additionally, maintaining a clean and well-ventilated environment for the animals can help reduce the risk of disease transmission. Regular cleaning of animal housing, proper waste management, and adequate spacing to prevent overcrowding can all contribute to a healthier environment for the animals.

Implementing a comprehensive vaccination program tailored to the specific diseases prevalent in the area can also be beneficial. Vaccinations can enhance the animals' immune systems, reducing the likelihood of them contracting and spreading diseases.

Lastly, monitoring the health of the animals closely and conducting regular veterinary check-ups can help identify any potential diseases at an early stage. Prompt diagnosis and treatment can prevent the spread of the disease to other animals and minimize the overall impact on the farm.

By focusing on these preventative measures, Jason can significantly reduce the risk of disease outbreaks on his farm, protect the health and well-being of his animals, and minimize potential economic losses.

Which example is a specific question that could be used to start a scientific investigation?

A. Do long droughts increase the likelihood of forest fires

B. Should there be more services to prevent forest fires

C. Are forest fires as frightening as mudslides

D. What is the most devastating effect of a forest fire

Answers

Answer:

A specific question that could be used to start a scientific investigation is A. Do long droughts increase the likelihood of forest fires. This question can be tested and answered through scientific methods and data collection.

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