Operons are common in bacteria but not in eukaryotes. How do you think the external environment of a bacterial cell versus a eukaryotic cell can dictate the organization of genes that are required in the same pathway of cellular response

What influenza virulence factor is responsible for attachment?

A. hemagglutinin

B. neuraminadase

C. fusion protein

D. RNA-dependent RNA polymerase

E. angiotension receptor

What is the reason people die from flu?

A. High fever

B. Bacterial-induce pneumonia

C. Heart failure

D. Flu-induced pneumonia

You have consumed an oven roasted turkey leg containing carbohydrate (glycogen), protein (actin and myosin), and fat (triglycerides). Begin this essay by diagramming and explaining the anatomy of the digestive system (GI track and accessory organs). From the mouth to the point of absorption, detail the pathway of each nutrient monomer as it is (1) digested and ultimately (2) absorbed. BE AS DETAILED AS POSSIBLE.

Compare the life cycle of a fern to that of a flowering plant. What are the reproductive structures of the fern compared to the reproductive structures of the flowering plants? How do the reproductive structures in flowering plants provide them with an advantage to growth in various habitats?

1. A microbe using anaerobic respiration is most likely to reduce:

Fe³⁺

glucose

O₂

pyruvate

CO₂

_2. In anaerobic respiration, glucose is oxidized to ____.

carbon dioxide

water

oxygen

ATP

NADH

3. What is a likely final electron acceptor for a bacterium using anaerobic respiration?

NO₃^-

glucose

NAD+

O₂

pyruvate

Describe the dramatic increase in the rate of obesity and explain why it increased so dramatically. What is the significance of sugar, fat, and salt? How can their significance be applied to the food industry and its customers/consumers?

Describe in detail the chemically altered process that occurs in the brain when people eat foods that are high in sugar, fat, and salt. Include relevant concepts, their corresponding definitions, and the relationships between them in your explanation

1.Describe one situation where a flower and its pollinator show coevolution.

A)What traits does the flower have that attracts a specific pollinator?

B)What benefit does the pollinator receive?  

Does an organism respond in order to fit into the environment in an evolutionary sense or does the environment select the organism, or do both occur? Explain

In the course of evolution of the eukaryotic cell, the ability to store newly synthesized molecules is associated with: a) the nucleus of prokaryotes, b) vesicles that contain enzymes that perform dehydration synthesis, c) lysosomes, d) the nucleoid area of the cytoplasm. e) proteins produced outside of the Endoplasmic reticulum.  

Answer B why?

For eukaryote cells to evolve into new types of eukaryotic organism, which of the following would one expect to occur? a) All the cells are identical b) The endoplasmic reticulum is not involved. c) These specialized cells activate only the genes in their nucleoid area. d) Cells must be getting new genetic mutations and more DNA e) none of these are true.

answer D why?

In the evolution of the eukaryotic cell, these cells have key changes that include which of the following:

a) These cells reproduce by copying their DNA perfectly each generation.

b) They have their DNA in the nucleoid area.

c) have adapted the mesosome membrane system of the prokaryote to form a nucleus and an endoplasmic reticulum.

d) each new type of new eukaryote cell has its mRNA unchanged from its original mRNA,

e) none of these are true.

Most of the carbon dioxide we exhale is produced in:

A) glycolysis.

B) photosynthesis in the chloroplasts,

C) formation of pyruvate during glycolysis,

D) the mitochondrion during the Krebs cycle,

E) none of these.

Which is true of Prokaryote cells?

A) Their DNA exists in a nucleoid area the synthesis of proteins depends on random interactions between mRNA and rRNA,

B) They contain membrane-bounded compartments or organelles.

C) A true nucleus contains the DNA in the form of chromosomes

D) They all contain mitochondria

E) They contain many organelles in the cytoplasm

In both Prokaryotes and Eukaryotes, which of the following structures can cross cell membranes using the same protein channels as water?

A) mRNA,

B) triglycerides,

C) large, non-polar molecules,

D) DNA,

E) gases (CO₂ and O₂) and small ions.

plz explain the answer , Thank you

Mumps is a contagious childhood disease. A vaccine has been widely available for several decades now, leading to a dramatic decline in the incidence of the disease. Data from the CDC show that vaccination coverage against the mumps virus is now about 90%.

Here are some estimates of the transmission parameters for the mumps virus:
gamma= 0.08
beta= 0.45    
R0 =5.6

a) What is the meaning of R0 in this disease model?

b) What fraction of the population should be vaccinated in order to prevent the spread of the disease? (explain)

c) Sometimes vaccines are not 100% effective. A single dose of the MMR vaccine is only about 90% effective. How does that change your estimate for the fraction of the population that should be vaccinated?

You have a piece of double stranded DNA that is 300 base pairs and 50% guanine

1, How many H bonds hold the strands together?

2. How many purines are in the molecule?

3. How many pyrimidines in this molelcule?

4 Would you expect this strand to "melt" at a higher or lower temperature than AT rich DNA?

Define and explain the concepts “personal problem” and “social problem.” Explain how obesity could be viewed as both a personal problem and a social problem. Explain how the causes and consequences of obesity are different when it is perceived as a social problem versus a personal problem.