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3 years ago

What is the role of lactase? which sugar does the act on in reaction?

Biology

1 answer:

Dmitry [639]3 years ago

6 0

Answer:

This enzyme helps to digest lactose, a sugar found in milk and other dairy products. Lactase is produced by cells that line the walls of the small intestine. ... Lactase functions at the brush border to break down lactose into smaller sugars called glucose and galactose for absorption.

Explanation:

Lactase is an enzyme produced by many organisms. It is located in the brush border of the small intestine of humans and other mammals. Lactase is essential to the complete digestion of whole milk; it breaks down lactose, a sugar which gives milk its sweetness.

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A student mixes various molecules needed for DNA replication. When he adds DNA, replication occurs, but each DNA duplex consists

weeeeeb [17]

Answer: DNA Ligase

Explanation:

During DNA replication, both the parental DNA strands are separated and act as templates for the synthesis of new strands. The formation of the new strands occurs in only 5'-3' direction and thus both the strands are synthesized in a different manner. One new strand with the template of 3'-5' direction will be synthesized continuously and is called a leading strand. The other strand with the template of 5'-3' direction will be synthesized discontinuously in the form of DNA fragments. These fragments are called Okazaki fragments and the strand is called a lagging strand. DNA ligase connects these fragments later to form a continuous lagging strand.

Therefore, DNA ligase is required for ligation of Okazaki fragments, and in absence of DNA ligase, the ligation of fragments will not occur and the newly synthesized strand will be discontinuous. However, if DNA ligase is not present in the reaction mixture, then the chances are that not all the newly synthesized DNA strands will be discontinuous. Only the DNA molecule with the lagging strand will be in the form of fragments.

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2 years ago

What do all living things have in common with eachother

raketka [301]

Answer:

growth, reproduction, they are made up of cells, they respond and adapt to their environment, and obtain and utilize energy.

Explanation:

every living thing has those 6 characteristics.

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3 years ago

Read 2 more answers

Outline the pathway of a breath of air from the nose to the alveoli.

Alekssandra [29.7K]

Answer:

Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)

Explanation:

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2 years ago

The bacteria have an initial concentration of 1000 cells/cm3 . Each cell divides once every 30 minutes. Calculate how long it wi

Levart [38]

It will take <u>120 minutes</u> for the concentration to become > 15000 cells/cm³

<u>Given data:</u>

Initial concentration ( density ) = 1000 cells / cm³

Target/final concentration = > 15,000 cells /cm³

<h3 /><h3>Calculating the concentration every 30 minutes </h3><h3 />

<em>note</em><em> : Given that each cell divides every 30 minutes </em>

<u>After the first 30 minutes </u>

Concentration = 2000 cells / cm³

<u>After 60 minutes </u>

concentration = 4000 cells / cm³

<u>After 90 minutes </u>

concentration = 8000 cells / cm³

<u>After 120 minutes </u>

concentration = 16000 cells / cm³

Therefore after 120 minutes the concentration of the cells will be greater than 15000 cells/cm³ ( i.e. 16000 cells/cm³ )

Learn more about concentration : brainly.com/question/17206790

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2 years ago

What is activation energy

Marizza181 [45]

<span>Activation energy refers to the amount of energy required by certain chemicals for them to have a reaction.

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3 years ago

What is the role of lactase? which sugar does the act on in reaction￼?

What is the role of lactase? which sugar does the act on in reaction?