Pub Med (First year activities)
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شباب في خطأ في تضاعف DNA قد تكون طفرة أو شيء من هذا القبيل(Mistake in the building) فإنه معانا نقطة تسمى check point
هذي النقطة إذا كان الخطأ غير جسيم فإنها تحوله لعملية الإصلاح كان في خطأ جسيم فإنها تخرجه عبر apoptosis
او نيكروسس
checkpoint detects that DNA replication is incomplete before mitosis. What should happen?
﴿ رَبِّ اشرَح لي صَدري وَيَسِّر لي أَمري وَاحلُل عُقدَةً مِن لِساني يَفقَهوا قَولي ﴾
During preparation, a researcher specifically wants to demonstrate tissue lipids. Which approach is more advantageous?
A. Routine paraffin processing
B. Frozen section
C. Dehydration with alcohol followed by paraffin
D. Clearing with xylene before sectioning
A tissue sample must be examined within minutes during surgery. Which method is most appropriate?
A. Paraffin section
B. Frozen section
C. Serial paraffin section
D. Resin embedding
Repost from قسم النماذج & MCQ لدفعة 43
🎚- بنك مُجمَّع من الدفعات السابقة
يضم أسئلة مُجمَّعة من اختبارات الدفعات السابقة، ابتداءً من دفعة 37 وحتى دفعة 43، مع التركيز على ما يخص مقررنا الحالي 🟢
The fixative has the following functions EXCEPT?
A. Hardens the tissue
B. Preserves the structure of the tissue
C. Prevents the staining of the tissue
D. Kills the bacteria in the tissue
One statement is NOT correct?
A. Dehydration occurs by descending grades of alcohol
B. Xylol is a solvent used for clearing
C. Embedding occurs in the hard paraffin
D. Egg albumin is used for mounting of the sections on the glass slides
Concerning the paraffin technique, the followings are fixative EXCEPT?
A. Formol saline (4% formaldehyde)
B. Bouin's fluid
C. Susa
D. Xylol
A histological section shows shrunken cells with condensed and fragmented nuclei, while the plasma membranes remain largely intact and there is no significant inflammatory response. Which process is most likely?
78- Golgi complex?
A Has convex surface called maturing face
B Has concave surface called forming surface
C Has wide cisternae tend to narrow at the end
D None of above
Which part connects the eyepiece to the objective lens?
A. Nosepiece
B. Body tube
C. Stage
D. Condenser
A mutation disables a checkpoint mechanism. A second mutation reduces p53 activity. The cell subsequently accumulates DNA damage and continues dividing. Which outcome is MOST likely?
Compound microscope has
A one lense
B two lense
C three lense
D more than that
The DNA between adjacent nucleosomes is called:
A. Central DNA
B. Linker DNA
C. Coding DNA
D. Mitochondrial DNA
DNA is negatively charged mainly because of its:
A. Amino groups
B. Phosphate groups
C. Histones
D. Nitrogenous bases
