Biology Test 310

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Biology Test 310

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Weekly Quiz Competition

Question 1
4 / -1

Consider the following –

(a) DNA ligase can join 5’ to 3’ phosphodiester linkage

(b) Both strand of DNA of structural gene can not be transcribed

How many is /are correct-

A
only a

B
only b

C
both a and b

D
both wrong
Question 2
4 / -1

If lactose is absent in medium than which is probable correct for lac operon-

A
lac operon not express at all

B
regulator gene i not express

C
lac operon act as repressor

D
small level of lac operon expression always present

Solution

Small level of lac operon expression always present
Question 3
4 / -1

Down syndrome is caused due to

A
bacterial infection

B
a chromosomal abnormality

C
Viral infection

D
lack of oxygen supply to the brain during birth

Solution

Correct option is B. a chromosomal abnormality
Question 4
4 / -1

In a cross between AABb and AaBb , percentage of progeny with AaBb Genotype is-

A
25%

B
36%

C
10%

D
50%

Solution

50 percent gamete receive Aa gametes
Question 5
4 / -1

From given example which of the following is not according to mendel law of dominance-

(a) endosperm of gymnosperm

(b) aleurone layer in monocot seed

(c) nucellus of gymnosperm

Mark the correct answer-

A
only a

B
both a and b

C
both a and c

D
None of the above

Solution

for mendel law of dominance factor should be in pair
Question 6
4 / -1

Law of segregation is not valid in case of –

(a) gametogenesis in algae

(b) sporogenesis in algae

(c) embyrogenesis in bryophytes

Mark the correct answer-

A
only a

B
both a and b

C
both a and c

D
None of the above

Solution

for law of segregation meiosis should occur
Question 7
4 / -1

AaBbCc genotype form 3 type of different gamete this means –

A
two genes are linked

B
all three linked

C
always form 8 gamets

D
no linkage occur

Solution

de to linkage of two genes number of gamets reduce
Question 8
4 / -1

A colour blind Man marries to normal female have one normal daughter and one colourblind son which is probability of next daughter to be colour blind-

A
50 percent

B
100 percent

C
zero percent

D
25 percent

Solution

mother is carrier so every time 50 percent chance is tha daughter is colour blind
Question 9
4 / -1

If individual with genotype TtRr(tall round) is crossed with ttrr (dwarf wrinkled) than it give two type of genotype only-

A
complete linkage

B
incomplete linkage

C
no linkage but independent assortment

D
all of the above

Solution

In complete linkage only parental type obtained
Question 10
4 / -1

Mark the incorrect-

A
co-dominance- both allele are dominant

B
multiple allele- two allele in one individual for one trait

C
polygenic inheritance – TTrr and TtRr give same phenotype

D
pleiotropy – more than one symptom due to one defect

Solution

In co-dominance dominant recessive relationship is absent

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Re-Attempt Weekly Quiz Competition

Biology Test 310

Result

Biology Test 310

Score

-

Rank

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SHARING IS CARING

Question 1

only a

only b

both a and b

both wrong

Question 2

lac operon not express at all

regulator gene i not express

lac operon act as repressor

small level of lac operon expression always present

Solution

Question 3

bacterial infection

a chromosomal abnormality

Viral infection

lack of oxygen supply to the brain during birth

Solution

Question 4

25%

36%

10%

50%

Solution

Question 5

only a

both a and b

both a and c

None of the above

Solution

Question 6

only a

both a and b

both a and c

None of the above

Solution

Question 7

two genes are linked

all three linked

always form 8 gamets

no linkage occur

Solution

Question 8

50 percent

100 percent

zero percent

25 percent

Solution

Question 9

complete linkage

incomplete linkage

no linkage but independent assortment

all of the above

Solution

Question 10

co-dominance- both allele are dominant

multiple allele- two allele in one individual for one trait

polygenic inheritance – TTrr and TtRr give same phenotype

pleiotropy – more than one symptom due to one defect

Solution

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