IMMS ILA formative

Question 1

a gene sequence is coded in....
A. single strand DNA
B. double strand DNA
C. mRNA
D. tRNA
E. double stranded RNA

Answer 1

B. double stranded RNA

Question 2

a promoter sequence is coded in...
A. single strand DNA
B. double strand DNA
C. mRNA
D. tRNA
E. double stranded RNA

Answer 2

A. single stranded DNA

Question 3

specific amino acids bind to...
A. single strand DNA
B. double strand DNA
C. mRNA
D. tRNA
E. double stranded RNA

Answer 3

D. tRNA

Question 4

the transcriptome of a whole cell is composed of..
A. single strand DNA
B. double strand DNA
C. mRNA
D. tRNA
E. double stranded RNA

Answer 4

C. mRNA

transcriptome is all the mRNA present in a cell

Question 5

alternative splicing of coding regions producing different products of a gene occurs in
A. single strand DNA
B. double strand DNA
C. mRNA
D. tRNA
E. double stranded RNA

Answer 5

c. mRNA

think intron and exons

Question 6

A protein composed of two of more peptide chains held together by non-covalent cross links has this type of structure...
A. primary structure 
B. secondary structure 
C. Tertiary structure 
D. Quaternary structure 
E. None of the above

Answer 6

D. Quaternary structure

Question 7

in the cytoplasm, the structure that is created by covalent bonds...
A. primary structure 
B. secondary structure 
C. Tertiary structure 
D. Quaternary structure 
E. None of the above

Answer 7

A. primary structure

Question 8

Alpha helixes and beta sheets are examples of protein...
A. primary structure 
B. secondary structure 
C. Tertiary structure 
D. Quaternary structure 
E. None of the above

Answer 8

B. secondary structure

Question 9

in hypoxia, the abnormal HbS
A. flips from levo- to dextro 
B. deforms
C. dimerises
D. Polymerises
E. Crystallises

Answer 9

D. Polymerises

HbS = sickle cell haemoglobin

Question 10

The Hb structural change causes sickling by..
A. pulling on the cell membrane
b. changing the charge across the cell membrane
C. Binding to the cytoskeleton
D. Altering nuclear transcription
E. Dehydrating the cell by osmotic action

Answer 10

C. binding to the cytoskeleton

Question 11

the sickle cell initially block capillaries by..
A. Losing their streamlined shape and getting physically stuck
B. Entangling with the other sickle cells
C. Crystallising
D. activating platelets and thrombosis
E. activating endothelial cells and causing inflammation

Answer 11

E. activating endothelial cells and causing inflammation

Question 12

Total body water is distributed into three compartments. How is the TBW distributed by volume? (assumed health 70Kg man)
A. intracellular 28L, interstitial 14L and intravascular 3L
B. intracellular 42L, interstitial 11L and intravascular 3L
C. intracellular 24L, interstitial 14L and intravacular 3L
D. intracellular 28L, interstitial 11L and intravascular 3L
E. intracellular 24L, interstitial 11L and intravascular 3L

Answer 12

D. intracellular 28L, interstitial 11L and intravascular 3L

Question 13

what is the most prevalent cation intracellularly?

Answer 13

potassium