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11 Dec 2019

What sugar is present in DNA?

What sugar is present in mRNA?

What sugar is present in tRNA?

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Related questions

please help thank you :)

6) Guanosine consists of

a) A guanine base + a ribose sugar

b) A guanine base + a deoxyribose sugar

c) A guanine base + a ribose sugar + a phosphate group

d) A guanine base + a deoxyribose sugar + a phosphate group

e) A guanine base + a cytosine base

7) A deletion mutation in a viral DNA resulted in loss of 20 nm length of DNA. How many helical turns are missing?

a) 6 b) 20 c) 34 d) 60 e) 200

Question # 8 & 9.
Reverse transcriptase is an enzyme, which can utilize mRNA as a template and synthesize complementary DNA strand. If mRNA sequence is 5’AUGGUAUGCUCU 3’

8) What will be the sequence of complementary DNA strand?

a) 3’ AGAGCATACCAT 5’

b) 3’ ATGGTATGCTCT 5’

c) 3’ TCTCGTATGGTA 5’

d) 3’ TACCATACGAGA 5’

e) None of the above

9) How many codons are present in this mRNA?

a) 2

b) 4 c) 6 d) 8 e) 12

10) In gel electrophoresis, the migration of DNA molecules is unaffected by

a) Size of DNA

b) Shape of DNA

c) Strength of electric field

d) Strength of gel

e) None of the above

11) In biological macromolecules, the following two non-polar groups most commonly participates in the formation of hydrophobic interactions

a) N-H and O-H

b) N-H and C-H

c) C-H and C-C

d) C-H and O-H

e) C-C and O-P

You will use two tests in your experiment:

1. I 2 KI test for presence of starch. When I 2 KI is added to the unknown solution, the solution turns purple or black if starch is present. If no starch is present, the solution remains a pale yellow-amber color.

2 . Benedict’s test for reducing sugar. When Benedict’s reagent is added to the unknown solution and the solution is heated, the solution turns green, orange, or orange-red if a reducing sugar is present (the color indicates the sugar concentration). If no reducing sugar is present, the solution remains the color of Benedict’s reagent (blue).

---

Hypothesis Hypothesize about the selective permeability of dialysis tubing to the substances being tested.

... ?

Prediction Predict the results of the I 2 KI and Benedict’s tests based on your hypothesis (if/then).

....?

Fill in the blanks. Please choose one of the following choices from the (CHOICES) for each of the fill in the blanks.

The carrier proteins through which sugar enters pancreatic beta cells have _______________ (A Lower Km or A Higher Km or The Same Km) than the carriers through which sugar enters muscle cells at fasting blood sugar levels. In order for muscle cells to increase sugar import ______________ (Blood sugar levels must be high or Insulin must be present or Glycogen must be present or gen Glucagon must be present). Oh, and glucokinase has a _______________ (High Km or Low Km ) when compared to hexokinase.

_______________ (Proton Pumps or Iron Reductases or Ferriportins or Iron Oxidases) are responsible for the release of transferrin from the transferrin receptor and iron form transferrin. _______________ (Proton Pumps or Iron Reductases or Ferriportins or Iron Oxidases) Convert the iron to the active form in which it may be exported. This happens in the ________________ (Lysosome or Cytoplasm or Intermembrane Space or Interstitial Fluid ).

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