DNA replication - 3D – YouTube Dictation Transcript & Vocabulary
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نص تفاعلي وإضاءات
1.DNA is a molecule made up of two strands around each other in a double helix shape
2.Each strand is made up a sequence of four chemical bases by the letters A, C, G and T
3.The two strands are
4.This means that wherever there's a T in one strand there will be in an A in the opposite strand, and wherever there's a C there will be a G in the other strand
5.Each strand has a 5' end and a 3' end
💡 Tap the highlighted words to see definitions and examples
المفردات الرئيسية (CEFR B1)
represented
B1To present again or anew; to present by means of something standing in the place of; to exhibit the counterpart or image of; to typify.
Example:
"represented by the letters A, C, G and T."
twisted
A2To turn the ends of something, usually thread, rope etc., in opposite directions, often using force.
Example:
"twisted around each other in a double helix shape."
helicase
A2A A2-level word commonly used in this context.
Example:
"This unzipping is done by an enzyme called helicase"
finally
A2At the end or conclusion; ultimately.
Example:
"Finally the enzyme DNA ligase seals up the fragments of DNA"
complementary
B1A complementary colour.
Example:
"The two strands are complementary."
directions
A2A theoretical line (physically or mentally) followed from a point of origin or towards a destination. May be relative (e.g. up, left, outbound, dorsal), geographical (e.g. north), rotational (e.g. clockwise), or with respect to an object or location (e.g. toward Boston).
Example:
"The two strands run in opposite directions."
determines
A2To set the boundaries or limits of.
Example:
"This determines how each strand of DNA is replicated."
replicated
A2To make a copy (replica) of.
Example:
"This determines how each strand of DNA is replicated."
unzipping
A2To open something using a zipper.
Example:
"This unzipping is done by an enzyme called helicase"
formation
B2Something possessing structure or form.
Example:
"and results in the formation of a replication fork."
| كلمة | CEFR | تعريف |
|---|---|---|
| represented | B1 | To present again or anew; to present by means of something standing in the place of; to exhibit the counterpart or image of; to typify. |
| twisted | A2 | To turn the ends of something, usually thread, rope etc., in opposite directions, often using force. |
| helicase | A2 | A A2-level word commonly used in this context. |
| finally | A2 | At the end or conclusion; ultimately. |
| complementary | B1 | A complementary colour. |
| directions | A2 | A theoretical line (physically or mentally) followed from a point of origin or towards a destination. May be relative (e.g. up, left, outbound, dorsal), geographical (e.g. north), rotational (e.g. clockwise), or with respect to an object or location (e.g. toward Boston). |
| determines | A2 | To set the boundaries or limits of. |
| replicated | A2 | To make a copy (replica) of. |
| unzipping | A2 | To open something using a zipper. |
| formation | B2 | Something possessing structure or form. |
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نصائح القواعد والنطق للإملاء
Chunking
انتبه لتوقف المتحدث بعد العبارات لمساعدتك على الفهم.
Linking
استمع للنطق المتصل عندما تندمج الكلمات.
Intonation
ركز على تغييرات النغمة التي تبرز المعلومات المهمة.
تحليل مستوى الصعوبة وإحصائيات الفيديو
مواد الإملاء القابلة للتحميل
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