Work of follicular dendritic cells

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#Question id: 40200

#Applied Microbiology

Calculate the melting temperature (Tm) for the following primer sequence using the Wallace Rule

Sequence: 5'-GGCCAAAATTTTGGCC-3'

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#Question id: 40201

#Environmental Science

Match List I (Atmospheric Layers) with List II (Characteristics):

List I (Layer)	List II (Characteristic)
A. Troposphere	I. Reflects radio waves
B. Stratosphere	II. Lapse rate is positive (Temperature decreases with height)
C. Thermosphere	III. Contains the Ozone layer
D. Ionosphere	IV. Temperature increases significantly with height due to solar radiation

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#Question id: 40202

#Applied Microbiology

Assertion (A): Primers with high GC content generally have a higher melting temperature (Tm) than AT-rich primers of the same length.

Reason (R): Guanine and Cytosine are bonded by three hydrogen bonds, which require more energy to break than the two hydrogen bonds between Adenine and Thymine

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#Question id: 40203

#Applied Microbiology

Which cofactor is essential for the activity of Taq DNA polymerase during the PCR extension step?

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#Question id: 40204

#Applied Microbiology

Match the PCR component in Column A with its specific function in Column B

Column A (Component)	Column B (Function)
1. dNTPs	A. Provides the starting point for DNA synthesis
2. Primers	B. Building blocks for the new DNA strand
3. Buffer	C. Maintains pH and salt conditions
4. Template DNA	D. Contains the target region to be amplified

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#Question id: 40205

#Applied Microbiology

Read the following statements regarding PCR and choose the correct option.

Statement I: DNA synthesis during PCR always proceeds in the 3' ---------5' direction.

Statement II: If the annealing temperature is set too low, it often leads to non-specific binding of primers and amplification of incorrect products.