جامعه مجازی علوم پزشکی(جمع 🌻)

✅ #آموزش_چند_رسانه_ای ◀️ یکشنبه، سه شنبه، پنجشنبه 🔷فایل شماره 11 ♨️ تقویت زبان برای کنکور 🔴 در این ویدیو کوتاه کانجوگیشن در باکتری:انتقال پلاسمید با زبان ساده توضیح داده شده است. 📚 @ADbehdasht

✅ #آموزش_چند_رسانه_ای
◀️ یکشنبه، سه شنبه، پنجشنبه
📜 متن و سوالات فایل شماره 11

🔘راهنما: ابتدا ویدیو بالا را ببنید و خوب گوش بدهید. سپس متن زیر را بخوانید. مطمئن شوید که معنای همه لغات را می دانید. و در آخر به سوالات تستی طرح شده پاسخ دهید.

🔻 متن و سوالات:
🔵Conjugation is a mechanism of gene transfer theat requires direct
contact between donor and recipient cells.
A plasmid is a small piece of DNA, separate from the main
chromosome, that carries genetic information for such things as
antibiotic resistance.
The first step in plasmid transfer is contact between the donor
and the recipient.
The pilus of the donor cell recognizes and binds to specific
receptor sites on the cell wall of the recipient cell.
The plasmid then becomes mobilized for transfer when an enzyme
cleaves one strand of the plasmid at a specific nucleotide
sequence, called the origin of transfer.
A single strand of the plasmid, beginning at the origin of transfer,
enters the recipient cell.
Once inside the recipient cell, a complementary strand to the
single DNA strand is synthesized.
When donor and recipient cells are mixed toghether, eventually of
the cells become donors.🔴

🔅Biology, Eighth Edition (Raven)
Chapter 28: Prokaryotes
Bacterial Conjugation - Transfer of a Plasmid
Is bacterial conjugation the same as sex in eukaryotes?
Conjugation is commonly referred to as the bacterial equivalent
of sex. Conjugation is equivalent to sex in that it combines
genetic material from two different individuals into a single
genome. Like sexual reproduction conjugation produces new
genetic combinations. Sexual reproduction is tied to the
production of new individuals. Sex involves the vertical transfer
of genes, genetic information is passed down (vertically) from
parents to offspring. Conjugation is not involved in reproduction,
as no new individuals are produced. Conjugation is an example of
the lateral transfer of genes.🔅

🔵🔴سعی کنید به سوالات طرح شده از ویدیو پاسخ دهید:

1.Which of the following does NOT occur during bacterial
conjugation?
A) direct contact between donor and
recipient cells
B) shortening of the pilus
C) enzymatic cleavage of one strand
at the origin of transfer
D) unidirectional transfer of both DNA
strands
E) recipient cell becomes a donor cell
after conjugation

2.During bacterial conjugation, plasmid replication occurs in
A) the donor only.
B) the recipient only.
C) both the donor and recipient.
D) either the donor or the recipient,
but not both.
E) neither the donor nor the
recipient.

3.If one donor cell is mixed with 20 recipient cells, eventually
____ cells will become donors.
A) 2
B) 5
C) 10
D) 15
E) 20

4.The pilus is found on both the donor and recipient cells.
A) True
B) False

5.Plasmids are small pieces of DNA that may carry genetic
information for antibiotic resistance.
A) True
B) False

📝 دوستان عزیز، برای دیدن سایر فایل ها از این سری روی #آموزش_چند_رسانه_ای کلیک کرده و یکی یکی علامت بالا را بزنید.
➖➖➖➖➖➖➖➖➖➖➖➖➖
🔘مطالب بیشتر در:
🔘https://telegram.me/joinchat/BGZm0jwbZq4KYUog45AXTQ

🔸کلید سوالات:
1:D/2:C/3:E/4:B/5:A

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