Cumulative General Science/Technology Quiz

[Catharsis]

I can't think of anything good, so here's a mathematics question. Find the next word in the sequence:

Addition, multiplication, exponentiation, ____________

 

[brennan]

Interesting... factorialisation?

 

[Mise]

Would the steps be:
multiplication is repeated addition e.g. 3x2 = 3+3
exponentiation is repeated multiplication e.g. 3^2 = 3*3
________ is repeated exponentiation e.g. 3^(2^2) = 3^4 = 81
?

If I were to invent a word for that, I'd call it Superexponentiation. Or HYPERexponentiation!

 

[Catharsis]

Would the steps be:
multiplication is repeated addition e.g. 3x2 = 3+3
exponentiation is repeated multiplication e.g. 3^2 = 3*3
________ is repeated exponentiation e.g. 3^(2^2) = 3^4 = 81
?

If I were to invent a word for that, I'd call it Superexponentiation. Or HYPERexponentiation!

You've got the right link (well, -ish... it's more 3^3). There is a word for repeated exponentiation, though, so I'll wait to see if anyone knows it.

 

[SS-18 ICBM]

Is it tetration?

 

[Catharsis]

It is tetration! SS18-ICBM is up.

(e.g. ⁴3 = 3³³³)

 

[SS-18 ICBM]

Let's try something easy. Describe the two states of the lac operon.

 

[StarWorms]

What do you mean by 'states'? On and off?

In the presence of lactose, the lacI repressor binds to the lactose. LacZYA is transcribed, enabling the synthesis of lactose channel proteins, which go to the cell membrane, so the lactose can be uptaken into the cell and digested. Without lactose, lacI stays bound to the operator, preventing transcription of lacZYA.

 

[SS-18 ICBM]

You're up.

 

[StarWorms]

What is PCR and what is it used for? Name 5 of the components needed.

 

[ori]

polymerase chain reaction - used to amplify nucleic acid chains, usually DNA, needed:
DNA-polymerase (e.g. Taq-Polymerase, i.e. heat stable)
Nucleotides (dNTPs [DNA])
oligonucleotide primers to start the reaction (either gene specific or random)
DNA sample to amplify
reaction buffer (usually some Mg-ions)

also you need a thermocycler or if you are old fashioned you need a few waterbaths and quick hands

 

[StarWorms]

Correct, your turn now.

 

[ori]

ok name an antidote for methanol poisoning and how does it work?

 

[Genocidicbunny]

Fomepizole or Ethanol can be used. They inhibit the enzyme that breaks down methanol (competitive inhibitor is what its called I think), resulting in the majority of methanol and the antidote being excreted through the kidneys instead of being broken down.

Also, I dunno if this has been answered, but we can ask friends/relative, right? As long as they dont google or wiki it themselves that is.

 

[ori]

Fomepizole or Ethanol can be used. They inhibit the enzyme that breaks down methanol (competitive inhibitor is what its called I think), resulting in the majority of methanol and the antidote being excreted through the kidneys instead of being broken down.

your turn

 

[Genocidicbunny]

Anyone can go ahead and ask.

 

[peter grimes]

Here's a visual one, to brighten up the dullness of all these words


A question in 4 parts:

What?
When?
Where?
Why?

 

[dutchfire]

Fomepizole or Ethanol can be used. They inhibit the enzyme that breaks down methanol (competitive inhibitor is what its called I think), resulting in the majority of methanol and the antidote being excreted through the kidneys instead of being broken down.

Also, I dunno if this has been answered, but we can ask friends/relative, right? As long as they dont google or wiki it themselves that is.

Using alcohol as an antidote, that's a great idea

What?
When?
Where?
Why?

Would that happen to be some primitive radar in England, pre WW2?

 

[peter grimes]

@ dutchfire - not exactly. Remember - this question is in four parts

 

[nonconformist]

Here's a visual one, to brighten up the dullness of all these words


A question in 4 parts:

What?
When?
Where?
Why?

South coast of Britain, concave amplifying listening posts to hear German aircraft aproaching, circa 1939 I think.