In humans, albinism (unpigmented skin, hair, and eyes) is due to an enzymatic deficiency, and it is an autosomal recessive trait. Suppose that in a small country of one million people (“Generation 1”), there are 500 aa albinos and 9000 Aa heterozygous carries. If the Generation 1 follow the Hardy-Weinberg equilibrium?

a) then the number of homozygous aa albino individuals would be equal to P2

b) there were 500 albino individuals in generation one.

c) then the number of homozygous aa albino individuals would be equal to q2

d) there were 25 albino individuals in generation one.

Which of the following is the correct prediction about the hardy-weingburg equilibrium?

#Question id: 4106

#Unit 3. Fundamental Processes

When bacteriophage lambda infects a sensitive bacterium, one of the first messenger RNA species synthesized is very short, beginning at a site P L and extending just through an adjacent gene N. After the appearance of the gene N protein, messages become much longer, still beginning at PL but extending far beyond gene N. The N gene encodes

#Question id: 4459

#Unit 3. Fundamental Processes

Give correct explanation, why RNA polymerase can initiate a new RNA chain on a DNA template without any primer?

A. Because RNA polymerase starts most transcripts with an A, and that ribonucleotide binds the template nucleotide (T) with only two hydrogen bonds.

B. The enzyme has to make specific interactions with one or all of the DNA template strand, the initiating ribonucleotide, and the second ribonucleotide—holding one (or all) rigidly in the correct orientation to allow chemical attack on the incoming NTP.

C. The structure of the open complex shows that the s region 3/4 linker interacts with the template strand, organizing it in the correct conformation and location to allow initiation.

D. Consistent with this, in experiments using an RNA polymerase containing a s70 derivative lacking this part of s, initiation requires much lower than normal concentrations of one or both of the first two ribonucleotides.

#Question id: 5292

#Unit 8. Inheritance Biology

A transformation experiment is performed with a donor strain that is resistant to four drugs: W, X, Y, and Z. The recipient is sensitive to all four drugs. The treated recipient population is divided up and plated on media containing various combinations of the drugs. The table below shows the results:

Following observation are given

A) X gene is obviously quite distant from the other three genes

B) Y gene is obviously quite distant from the other three genes

C) The Order is three closely link gene W Z Y

D) The Order is three closely link gene W X Z

Which of the following combination is correct?

#Question id: 11910

#Unit 10. Ecological Principles

During succession species that colonize in early seral stages tend to have different life-history characteristics than those that colonize in later seral stages ;

A) Early seral stage in succession

B) Late seral stage in succession

 i) Good seed dispersal ability

ii) Lower plant efficiency in low light

iii) Seed dispersal  by animal

iv) Slower the resource acquisition

v) Found large biomass

vi) Seed longevity is long type

Which of the following is the correct prediction about early and the late successional seral stage?

#Question id: 560

#Unit 1. Molecules and their Interaction Relevant to Biology

Vmax for an enzyme-catalyzed reaction: