Genetics and Evolution (NEET Biology): Questions 95 - 99 of 184

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Question number: 95

» Genetics and Evolution » Molecular Basis of Inheritance » Lac Operon

Appeared in Year: 2005

MCQ▾

Question

E. coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because (AIPMT)

Choices

Choice (4) Response

a.

The lac operon is constitutively active in these cells

b.

They cannot synthesize functional betagalactosidase

c.

In the presence of glucose, K. coli cells do not utilize lactose

d.

They cannot transport lactose from the medium into the cell

Question number: 96

» Genetics and Evolution » Heredity and Variation » Linkage and Crossing Over

Appeared in Year: 2005

MCQ▾

Question

Family has 9 girls, Probability of son at 10th birth is (UP CPMT)

Choices

Choice (4) Response

a.

100%

b.

25%

c.

50%

d.

75%

Question number: 97

» Genetics and Evolution » Heredity and Variation » Chromosomes and Genes

Appeared in Year: 2001

MCQ▾

Question

Functioning of structural genes is controlled by (MP PMT)

Choices

Choice (4) Response

a.

Regulator gene

b.

Ligase

c.

Operator

d.

polymerase

Question number: 98

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

Appeared in Year: 2010

MCQ▾

Question

Which one of the following symbols and its representation, used in human pedigree analysis is correct? (CBSE)

Choices

Choice (4) Response

a.

square showing unaffected female

Square Showing Unaffected Female

square showing unaffected female

= unaffected female

b.

circle indicating unaffected male

Circle Indicating Unaffected Male

circle indicating unaffected male

c.

diamond showing male affected

Diamond Showing Male Affected

diamond showing male affected

= affected male

d.

mating between individuals

Mating Between Individuals

mating between individuals

Question number: 99

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

Appeared in Year: 2000

MCQ▾

Question

Irregularity is found in Drosophila during the organ differentiation for example- inplace of wing, long legs are formed. Which gene is responsible for (AIPMT)

Choices

Choice (4) Response

a.

Homeiotic gene

b.

Double dominant gene

c.

complimentary gene

d.

plastid

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