Look at the diagram of DNA below. Which of the following parts of the diagram represents the hydrogen bond that holds the two strands of DNA together? [Key: yellow-A, green-T, red-G, blue-C]

Biology 09/01/2020 12:50 AM answersmine

Answered @ 09/01/2020 12:50 AM By answersmine

Answer;

Y-represents hydrogen bond

Explanation;

DNA is a type of nucleic acid, that carries genetic information in organisms. DNA is made up of nucleotide bases; guanine, Cytosine, Adenine,l and Thymine, which are the building blocks of nucleic acids.
Complementary base pairs of guanine with cytosine and adenine with Thymine between the DNA strands connect to each other using hydrogen bonds.
Hydrogen bonds between the complementary nucleotides keeps the two strands of DNA helix together.

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Which of the following best explains how the stamens are important to plant reproduction? a. They contain nectar and proteins that attract insect pollinators. b. They grow into the pollen tube, which allows pollen to travel to the egg. c. They are the female part of the plant and hold ovules and the embryo. d. They are the male part of the plant and hold the pollen in their anthers.

Biology 18/01/2020 11:25 AM answersmine

The answer should be:
D. They are the Male part of the plant and hold the pollen in their anthers
I took a quiz a couple months ago and I this question and I put D and my teacher marked it correct:). hope this helps

Question 6- Physical properties of an acid include... Tastes sour, usually no smell, and is corrosive. Tastes bitter, frequently burns nose when smelt, and feels slippery to the touch. Tastes sour, frequently burns nose when smelt, and frequently reacts with metals to form hydrogen.. Tastes sour, frequently burns nose when smelt, and feels sticky to the touch. 2 points QUESTION 7 What is the pH range of an acid? 0 - 6 6 - 8 8 - 14 0 - 14 2 points QUESTION 8 What is the pH range of a base? 0 - 6 8 - 14 6 - 8 0 - 14 2 points QUESTION 9 Select all of the examples of an acid. Tomatoes Bleach Baking soda Lemons Bananas Ammonia Vinegar Soap 4 points QUESTION 10 Select all of the examples of a base. Ammonia Soap Baking soda Vinegar Bleach Lemons Tomatoes Bananas

Biology 18/01/2020 11:23 AM answersmine

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Atoms that have filled outermost energy levels and do not participate in chemical bonding are called _____. ions cations inert covalent

Biology 18/01/2020 11:22 AM answersmine

Answer: Inert.

Explanation:

The atoms that have filled the outermost shell with 8 atoms do not participate in any chemical reaction or they do not even bond with other atoms to form bond.

These atoms are known as inert atoms. They do not participate in any bond formation or chemical reaction because they are stable. They have 8 or 18 atoms in the outermost shell which makes them stable.

Example: Argon, krypton et cetera.