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.
The answer to this is The Females give birth to live young and their endoskeleton is made up of chitin.
The statement they breathe using gills isn't the right answer because that is part of fishes not a mammal and fishes lay eggs not live young.
The statement the females have mammary glands isn't right because only male mammals have that.
So your true statement is The females give birth to live young and their endoskeleton is made up of chitin.
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To maintain a separate internal environment. most are semi-permeable to allow transfers from internal to external environments.
Answer: b. cell walls contain chitin
Explanation:
Plant cell wall is made up of cellulose. Plants have cellulose cell wall. Plants are eukaryotes, multicellular and have chlorophyll. Eukaryotic cells have membrane bound organelles such as the nucleus, mitochondria, golgi apparatus, and Chloroplast. Therefore plants are eukaryotes because they contain membrane bound organelles. Multicellular organism are organism with many cells thus plants are multicellular because a single plant is composed of many cells. Plants have chlorophyll which is found in the Chloroplast. Chlorophyll is used by plants to trap sunlight needed for photosynthesis.