Answer:
A) The genome is DNA based and single stranded.
Explanation:
The reason why it is DNA based is because DNA contains thymine base (T). It is not RNA based because RNA contains uracil base (U) instead of thymine and in the given question there is not uracil mentioned.
It is single stranded because according to Chargaff's rule a double stranded nucleic acid must have the ratio of purine bases to pyrimidine ratio as 1:1.
Adenine (A) & Guanine (G) are purine bases while Thymine (T) & Cytosine (C) are pyrimidine bases so according to Chargaff's rule AG/CT = ~ 1. It means [A+G] = [C+T]
Also, A makes interaction with T while C makes interaction G. It means,
[A] = [T]
[C] = [G]
By this we can easily infer that a double stranded DNA will have as much A as much it has T & same goes with C & G.
But, in the given question, A = 33% while Thymine = 28% which are not equal so this means that this molecule is single stranded.
true
false
B. 68% of the molecules have speeds between 450 meters/second and 550 meters/second.
C. 50% of the molecules have speeds between 450 meters/second and 550 meters/second.
D. 34% of the molecules have speeds greater than 550 meters/second.
68% of the molecules have speeds between 450 meters/second and 550 meters/second is correct option.
Nitrogen's rms speed will be (4 / 28) = 0.378 of helium's rms speed, yielding a speed of 0.378 1370 m s–1 = 517 m s–1. Now the factor is (4 / 44) = 0.301, resulting in a speed of 0.301 1370 m s–1 = 413 m s–1.
This data best supports the hypothesis that 68 percent of the molecules travel at speeds of 450 to 550 meters per second. B is the solution to your query.
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The doctor should reassure the patient that exposure to radiation from a medical device becomes dangerous only if it is exposed for a long time, in high doses, or repeatedly.
It is true that there is a particular risk for pregnant women with regard to the fetus. In this case, the ratio between the benefit to the patient and the possible risk of side effects should always be taken into account.
Answer:Cell membrane
Explanation:Forms a boundary between a cell and the surrounding environment and controls the passage of materials into and out of the cell.
Answer:
Cell Membrane (These are from my personal Biology Notes)-
Explanation:
Found in all cells (FIAC)
Selectivity permeable
Embedded with proteins
Regulates what enters or exits the cell
Phospholipid bilayer
Polar: head is hydrophilic (Likes water)
Nonpolar: tail; hydrophilic
B. They're harmless, because they're imaginary.
C. They're a kind of negative self-talk.
D. They're a kind of positive reinforcement.
The following statements is true of imagined risks: C. They're a kind of negative self-talk.
Which of the following statements is true of imagined risks?
In human relation, imagined risk is an exaggeration of a threat that can make an individual to overreact or develop behaviors that affect the such individual confidence level. Imagined risks are imaginary and they are created out of fear and doubt. Another name for imagined risks is negative self-talk. Imagined risks exist only in a person’s mind.
One of the keys to successful human relations is overcoming the fear of imagined risks. To do this, stop using negative self-talk and replace it with positive self-talk. Positive self-talk seeks to bring the positive out of the negative to help you do better, or just keep moving forward. The practice of positive self-talk is the process that allows you to discover the obscured optimism, hope, and joy.
Grade: 9
Subject: biology
Chapter: imagined risks
Keywords: imagined risks, positive self-talk, harmless, positive reinforcement, self-talk