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Describe the part played by each of the organelles involved in the production and secretion of the enzymes.

The Nucleus contains the DNA code for the amino acid sequence (2)
3. The Nucleolus makes rRNA (4)
5. The Ribosomes translate mRna in protein synthesis
6. The endoplasmic reticulum all...

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Prove that the square of an odd number is always 1 more than a multiple of 4.

First we consider how to represent an odd number. We know that any even number can be represented as 2k for some integer k since, by definition, all even numbers are multiples of 2. We also know that all ...

Answered by Josh L. • Maths tutor

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We have 2 spinners: spinner A and spinner B. Spinner A can land on 2, 3, 5 or 7. Spinner B can land on 2, 3, 4, 5 or 6. Spin both. Win if one spinner lands on odd and the other lands on even. Play game twice, what is the probability of winning both games?

P(win 2 out of 2 games) = P(win first game and win second game) = P(win first game)^2. So want to find the probability of winning a game.To win, either we need A odd and B even or we need A even and B odd...

Answered by Henry C. • Maths tutor

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Simplify (2x+3)^2 - (2x +3)(x-5). Give your answer in the form ax^2 +bx +c

Break this down into two parts.
a. Multiply out the 1st bracket, (2x+3)^2: This goes to (2x+3)(2x+3) which is equal to 4x^2 + 9 +6x+6x . Collect the like terms to get 4x^2 +12x +9.
b. Multiply...

Answered by Kenji S. • Maths tutor

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Why does this past tense verb take être instead of avoir like the others?

There are two groups of verbs in French which use être in the passé composé rather than avoir. The first group are the reflexive verbs (think of the morning routine verbs se laver, se lever, se doucher) a...

Answered by Genevieve S. • French tutor

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