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Answer:
DNA cloning allows a copy of any specific part of a DNA or RNA sequence to be selected from the millions of other sequences in a cell and produced in unlimited amounts in pure form.
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Answer:
C) biomass
Explanation:
Biomass is sustainable, and is created from creatures such as plants and animals that come from live life. Plants, wood and waste are the most common biomass materials for electricity.
They are known as feedstocks for biomass. Biomass power also can be an electricity source that is not green. Bioenergy is biomass energy or biofuel energy.
The complete question is :
As an epidemiologist you are going to investigate the effect of a drug suspected of causing malformations in newborn infants when the drug in question is taken by pregnant women during the course of their pregnancies. As your sample you will use the next 200 single births occurring in a given hospital. For each birth a medication history will be taken from the new mother and from her doctor; in addition, you will review medical records to verify use of the drug. [N.B.: These mothers are considered to have been followed prospectively during the entire course of their pregnancies, because a complete and accurate record of drug use was maintained during pregnancy.] The resultant data are: Forty mothers have taken the suspected drug during their pregnancies. Of these mothers, 35 have delivered malformed infants. In addition, 10 other infants are born with malfunctions. What is the relative risk between exposure to the drug and malformations?
Answer:
14
Explanation:
- The relative risk is a measure that is used to calculate or compare the likelihood or the chance that an event would occur while comparing the two groups.
- To calculate the relative risk, the probability of an event occurring in one group is compared with the probability of the event occurring in another group and this is done by dividing the probability of one group by another.
- The value of relative risk is always either zero or greater than zero but it cannot be negative.
- The value 1 indicates neutrality.
- The probability of an event = no. of favorable outcomes/ total no. of outcomes
- For the given question, 35 mothers out of 40 delivered infants that were malformed, so the probability of delivering malformed infants is 35/40.
- Out of the 200 births, 40 have occurred so total births left is 200 - 40 = 160
- Therefore, the probability of the second event is 10/160.
- Therefore relative risk is = (35/40)/(10/160) = (0.875/0.062) = 14
After a steroid hormone binds to its intracellular receptor, transcription of specific genes occurs. The activated receptor moves into the nucleus and binds to DNA
<h3>What is steroid hormone and intracellular receptor ?</h3>
Target cells have steroid hormone receptors in their nuclei, cytoplasm, and plasma membranes. They are typically intracellular receptors (often cytoplasmic or nuclear) that start the signalling processes for steroid hormones, which modify the expression of genes over the course of hours to days.
- By attaching to intracellular receptors, steroid hormones control cellular functions by changing the expression of specific nucleotide sequences. Since the majority of steroid receptors in target cells reside in the cytoplasm, they must enter the nucleus to change gene expression.
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