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Give 3 main differences between RNA and DNA.

DNA is double stranded while RNA is a single stranded polynucleotide chain. In DNA the pentose sugar is deoxyribose (one less oxygen containing hydroxyl group) and in RNA it is ribose. In DNA the four bases ...
DL
Answered by Dora L. • Biology tutor
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What is the difference in meaning between the aorist and perfect tense?

There is a subtle difference in meaning between these two tenses, which both refer to an action in the past. The aorist tense simply refers to a single, completed (not ongoing) action in the past, i.e. I X-e...
JB
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How do you conjugate verbs in the preterite tense for AR verbs in spanish?

To form the preterite tense of AR verbs such as cocinar you have to take off the -AR- so you are left with the stem - COCIN- and add the specific endings:yo (me) - é, tu (you) - aste, el/ella (he/she) - ó, n...
CF
Answered by Cicely F. • Spanish tutor
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Describe how a change in temperature affects enzyme activity.

Enzymes are substrate specific proteins which act as biological catalysts and as temperature increases, we see an increase in enzyme activity. This occurs because an increase in temperature causes molecules ...
FH
Answered by Freya H. • Biology tutor
7228 Views

How do you conjugate verbs into the imperfect tense?

To form the imperfect tense first put the verb into the infinitive and take of its AR/ER/IR ending. Then add either the -aba (I) -abas(You singular) -aba(He/she/it) -ábamos(we) -abais(you plural) -aban(they)...
Answered by • Spanish tutor
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