The milk sugar, lactose, is made up of glucose and galactose. Why type of carbohydrate is lactose?

1. What holds a compound together?_

dezoksy [38]

Answer: Chemical bonds

Explanation: an atom has a positively charged nucleus surrounded by a cloud of electrons.

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3 years ago

Could a particular form of life survive on the Martian surface

coldgirl [10]

Gizmono
NASA reignited our hopes of finding alien life when it announced the first direct evidence of liquid water on Mars. But before we start indulging in fantasies of space crabs and reptilian beings, we ought to remember that Mars is a frigid world with a thin atmosphere. And that raises an obvious question: What sorts of life forms could actually live there?

Any life on Mars today is almost certainly microbial, but beyond that, we can’t be sure of anything until we actually dig it up and study it. Still, we can make some educated guesses about the nature of Martian life, by taking a deep dive into some of the weirdest biology on planet

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3 years ago

Which of the following is NOT a true statement about binary fission

igor_vitrenko [27]

D. Is the answer you are looking for, because the new bacterium is almost always the same as the parent. Answer D. Is not true.

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3 years ago

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How do you know if something is an enzyme based on its spelling

mr_godi [17]

Answer and Explanation:

Enzymes are organic catalysts which are protein in nature. There are two types of naming enzymes:

<h3>Trivial naming</h3>

This method involves giving enzymes names based on the names of the persons who discovered them. The names of such enzymes end with the suffix-in, for example, pepsin, trypsin. Some of these names have been retained to date.

Enzyme Nomenclature by Enzyme Commission

This is the modern method of naming enzymes. The suffix-ase is added to the substrate or the reaction which the enzymes catalyses. Every enzyme code consists of the letters "EC" followed by the enzyme. For example

EC 1 oxidoreductases- oxidoreduction reactions

EC 2 transferases- transfer of a functional group

EC 3 hydrolases- catalyse hydrolytic cleaving

EC 4 lyases - adding groups to double bonds. e.g., C-C,C-O

EC 5 isomerases - catalyse structural changes in a molecule

EC 6 ligases - joining of two molecules

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Activity: Create your own cell membrane. In your model, be sure to include the following: parts/structures function/use layers t

Gwar [14]

Explanation:

Lipids are composed of fatty acids which form the hydrobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which id water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backbone) with up to 36 carbons.

Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties. Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds. The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water to diffuse across the membrane along the concentration gradient.

Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers or at as doorways for other molecules to pass through. Cholesterol, which is comparatively rigid, anchors other molecules attached to the membrane, maintain membrane stability or structural integrity and aid in separating some lipids, helping with membrane fluidity at low environmental temperatures.

Remember, essential features:

lipid bilayer
cholesterols
proteins (cell markers and doorways)

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

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