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#Question id: 2136


When a bacterium such as E. coli is shifted from a warmer growth temperature to a cooler growth temperature, it compensates by:

#Section 2: General Biology
  1. increasing its metabolic rate to generate more heat.

  2. putting longer-chain fatty acids into its membranes.

  3. putting more unsaturated fatty acids into its membranes.

  4. shifting from aerobic to anaerobic metabolism.

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#Question id: 3044

#Section 2: General Biology

If the pH indicator were left out of MacConkey agar, the medium would be

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#Question id: 3045

#Section 2: General Biology

Which one of the following combinations Mac-Conkey Agar allows to growth of gram negative bacteria?

(P) Bile salts                          (Q) Sodium chloride

(R) Methylene blue                  (S) Crystal violet

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#Question id: 3216

#Section 3: Genetics, Cellular and Molecular Biology

The frequency of galactosemia is approximately 1 in 40,000 live births. The frequency of the carrier state can be calculated as

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#Question id: 3250

#Section 3: Genetics, Cellular and Molecular Biology

Consider a diploid population at Hardy-Weinberg equilibrium. For a locus with two alleles, the frequency of the A1A1, A1A2 and A2A2 genotype is 0.01, 0.18 and 0.81) Which of the following statement is correct?

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#Question id: 3251

#Section 3: Genetics, Cellular and Molecular Biology

Looking at 3 allele per locus and following Hardy Weinberg equilibrium what will be the expected heterozygosity if q1=0.5, q2=0.3, q3=0.2

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#Question id: 3252

#Section 3: Genetics, Cellular and Molecular Biology

 The unaffected brother of a cystic fibrosis affected girl is referred for genetic counseling. Assume that the population is in Hardy-Weinberg equilibrium. Which of the following is correct?  (Cystic fibrosis is an autosomes recessive inheritance with an incidence of 1 in 2500).