Plants cells has large vacuole, chloroplast and a cell wall while animal cells don't have those features.
Answer:
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Explanation:
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Answer:
a. + glucose, + lactose = On
b. - glucose, - lactose = Off
c. + glucose, - lactose = Off
d. - glucose, + lactose = On
Explanation:
Lac operon has both types of control, repressible and inducible.
Whenever glucose level is low in the cell, an enzyme known as adenylyl cyclase raises the level of cAMP which forms a dimer with CRP protein and they both act as activator of lac operon and cause expression.
Apart from this, when lactose is present in the cell, β-galactosidase enzyme metabolizes lactose to form allolactose which causes allosteric repulsion in the lac repressor and causes its removal from the operator. As soon as repressor is removed lac operon gets activated.
In wild type lac operons, the expression of lac operon occurs when glucose level is low in the cell and lactose is present but in this mutant presence or absence of glucose will not make a difference because CRP will bind Plac promoter independent of cAMP level i.e. activator CRP will work even in high glucose concentration. If lactose is present then lac operon will always express so in option 'a & d' lac operon will express but in option 'b & c' it will not express.
<u>Complete Question:</u>
A nurse is caring for a 26-year-old client recently diagnosed with human immunodeficiency virus (HIV) and has a CD4 count of 150. The client needs an update on immunizations and asks which ones are needed. Which vaccines are required to comply with the recommended immunization schedule for a client with HIV?
a. Influenza; measles, mumps, rubella (MMR); varicella; and hepatitis A vaccines
.
b. Pneumococcal, MMR, influenza, and varicella vaccines
.
c. Diphtheria, tetanus, hepatitis A, and hepatitis C vaccines
.
d. Tetanus, hepatitis B, influenza, and pneumococcal vaccines.
<u>Correct Option:</u>
Tetanus, hepatitis B, influenza, and pneumococcal vaccines are required to comply with the recommended immunization schedule for a client with HIV.
<u>Option: D</u>
<u>Explanation:</u>
- Human immunodeficiency virus (HIV) is responsible for killing the WBC (white blood cells) that battle infection, as this virus destroys the immune system, which can follow certain cancers.
- While AIDS (acquired immune deficiency syndrome) is the last stage of HIV infection.
- In contrast to influenza vaccine delivery that avoids both viral and bacterial pneumonia, Streptococcus pneumoniae vaccination is suggested. The risk of invasive pneumococcal illness is strong for HIV-infected people.
- HIV patients obviously recover from influenza vaccination, the reaction of antibodies to seasonal flu vaccination is usually lower than among HIV-uninfected people.
