The tube that connects the bladder and the outside is called the

Which statement accurately describes Binary star system ?

ZanzabumX [31]

Answer:

The accurate description for the binary star systems are that they have stars that might appear to wobble and also, often have one star that is brighter than the other. The binary star systems are often refer to as the double star system which consists of only two star in the system.

4 0

3 years ago

As a molecule moves through the plasma membrane it passes through a hydrophobic layer of phospholipid tails then a hydrophilic l

Firdavs [7]

Answer:

"As a molecule moves through the plasma membrane it passes through <em>a hydrophilic layer of phospholipid heads then a hydrophobic layer of phospholipid tails and then another hydrophilic layer of phospholipid heads".</em>

Explanation:

Biological membranes are formed by two lipidic layers, proteins, and glucans.

Lipids characterize for being amphipathic molecules, which means that they have both a hydrophilic portion and a hydrophobic portion at the same time. These molecules have a lipidic head that corresponds to a negatively charged phosphate group, which is the polar and hydrophilic portion. They also have two lipidic tails that correspond to the hydrocarbon chains -the apolar and hydrophobic portion- of the fatty acids that esterify glycerol.

Membrane lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.

Through this lipidic bilayer, some molecules can move from one side of the cell to the other, which happens because of concentration differences. When this occurs, molecules must pass through the hydrophilic layer of phospholipid heads then through the hydrophobic layer of phospholipid tails and then again through another hydrophilic layer of phospholipid heads.

3 0

4 years ago

Identify the main function of a stereo dissection microscope

nignag [31]

Answer: Allows a magnified 3-Dimensional perspective when dissecting. This enables more accuracy in movements.

Explanation:

4 0

3 years ago

Which of the following statements regarding the structure of triglycerides is TRUE?

lisov135 [29]

Answer:

The correct answer is<u> "A" Fatty acid chains in a triglyceride molecule, which contain a single double bond, are referred to as monounsaturated fatty acids.</u>

Explanation:

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7 0

3 years ago

Suppose you perform a serial dilution of Amylase from a stock solution with a concentration of 500ug/mL. In five tests tubes you

saveliy_v [14]

Answer:

The final concentration in test-tube 3 is = 4ug/mL

Explanation:

Dilution factor = V initial / V final

Concentration of Stock solution = 500 ug/mL

5 test tubes are prepared with 4 mL of water

1 ml of stock solution is added to the 1st test tube.

therefore, the total volume of 1st test tube is = 4 ml + 1 ml = 5ml

∴ the concentration of 1st Test tube →

C = m/V [m= mass (solute) , v= volume]

=500 ug / 5 ml = 100 ug/ml

From 1st test tube, 1 ml is taken out and that is added to the 2nd test tube.

∴ the concentration of 2nd Test tube = 100 ug / 5ml

= 20 ug/ml

From 2nd test tube, 1 ml is taken out and that is added to the 3rdd test tube.

∴ the concentration of 3rd Test tube = 20 ug / 5ml

= 4 ug/ml

The final concentration in test-tube 3 is = 4ug/mL

5 0

4 years ago