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sladkih [1.3K]
3 years ago
15

While alcohol, tobacco, drugs, and pollution are never healthy for a developing fetus, it is most vulnerable during the first tr

imester.
a. True
b. False
Biology
1 answer:
Nana76 [90]3 years ago
3 0

Answer:

True. The first trimester is the most crucial time for the development of the fetus.

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"DNA denatures at a higher temperature than does protein, yet its structure depends on relatively weak hydrogen bonds. Why the d
Reika [66]

The option are not given and the options are:

Proteins are denatured by breaking covalent bonds.

Linear molecules like DNA are inherently stable.  

Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.

The statement is incorrect; it actually takes far more energy to denature proteins than it does to denature DNA.

Answer:

The correct answer is- Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.

Explanation:

Proteins become denatured when it looses its three-dimensional structure. Disulfide bond and hydrogen helps in stabilizing the three-dimensional structure of proteins and if these bonds break due to any factor protein lost its structure and function.

DNA is made up of a large amount of hydrogen bond because in AT base-pairing two hydrogen bonds are required and in GC base pairing three hydrogen bonds are required. Therefore it can be concluded that as more hydrogen bonds stabilizes DNA than protein its melting temperature is higher than protein.

3 0
3 years ago
The illustration is a representation of the different ways molecules are transported across a
Liula [17]
  • The illustration is a representation of the different ways molecules are transported across a cell membrane, that represents active transport is IV.
  • Active Transport is described as a process that involves the movement of molecules against a gradient or an obstruction from a location of lower concentration to a region of greater concentration.
  • A protein pump uses ATP, which is a form of stored energy, to move molecules during active transport.The process of active transport, which moves molecules using ATP as an external energy source.
  • Some examples of active transport include the absorption of glucose in the human intestine and the uptake of minerals or ions into the root hair cells of plants.
  • Active transportation comes in two flavors:
  1. Primary active transport
  2. Secondary active transport.

To know more about active transport check the below link:

brainly.com/question/11219338

#SPJ9

8 0
1 year ago
Which of the following best describes a benefit of studying biology.
never [62]

One is able to intelligently debate issues.

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What are the two main reasons of pollutants, on the basis of their decomposition?
Luden [163]
They are biodegradable and non biodegradable <span />
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Which nutrient is responsible for causing the most accidental deaths in children?
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The nutrient that is responsible for causing most accidental deaths in children is iron.
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