Class 12 Biology notes and question bank — NEB Exam
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Explore Class 12 Biology past and model questions by chapter, year, marks and question type.

178 questions found

161
MCQ1mModel QuestionSolution available

What kind of enzyme is needed for digestion of milk protein in human beings?

A

Rennin

B

Lactase

C

Pepsin

D

Sucrase

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162
Long4+2+2 = 8Model QuestionSolution available

“Genes are inherited in new combination due to crossing over in the gametes”. Interpret this statement with its mechanism and necessary diagrams. Assess its significance also.

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163
Long2+4+2Model QuestionSolution available

Semi-conservative mode of DNA replication is the most common mode of replication which results in two identical daughter DNA molecules. Explain various enzymes and mechanism involved during this process with necessary diagrams

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164
MCQ1mModel QuestionSolution available

In frog, coelom is derived from which embryonic layer?

A

Ectoderm

B

Mesoderm

C

Endoderm

D

Mesoglea

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165
Long1+1+5+1Model QuestionSolution available

Three German biochemists Embden, Meyerhof and Parnas (EMP) worked out a pathway which involved the formation of pyruvic acid from a glucose molecule. Identify this pathway. Name the site where this pathway takes place in a cell. Construct a step by step pathway developed by them. List the net gain of ATP in this pathway.

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166
Short4Model QuestionSolution available

Biotechnology is an emerging discipline in this era. Would you think it can be used to mitigate the problem of food scarcity in context to Nepal? Justify your opinion.

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167
Short3+1 = 4Model QuestionSolution available

Assuming you are provided seeds for germination, which influencing parameters you need to follow for normal germination? What would happen when seeds are kept in low temperature

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168
Short1mModel QuestionSolution available

State the function of part D.

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169
Short2mModel QuestionSolution available

Name the parts A to D.

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170
Short1mModel QuestionSolution available

Identify the given figure.

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171
Short1+2+2= 4Model QuestionSolution available

Define vascular bundle. What type of vascular bundle is present in monocot root? Mention any two functions of vascular bundle.

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172
MCQ1mModel QuestionSolution available

Which of the following tissue lacks blood supply?

A

Areolar

B

Muscular

C

Bone

D

Cartilage

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173
MCQ1mModel QuestionSolution available

What basis would you apply to distinguish a meristematic tissue from a permanent tissue?

A

Supporting plant

B

Providing food

C

Activating cell division

D

Losing ability of cell division

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174
MCQ1mModel QuestionSolution available

Which type of mutation is caused by the addition or deletion of a single nitrogenous base?

A

Transition

B

Transversion

C

Frame shift

D

Substitution

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175
MCQ1mModel QuestionSolution available

Which one of the following parts is not responsible for transpiration in plants?

A

Root

B

Stem

C

Leaves

D

All aerial parts

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176
MCQ1mModel QuestionSolution available

What type of development of an embryo from an unfertilized egg is called?

A

Parthenocarpy

B

Parthenogenesis

C

Polyembryogeny

D

Polycarpy

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177
Long4+2+2Model QuestionSolution available

A human being usually takes complex foods in her/his diet. However, our body needs its simpler form. Describe how the complex foods are converted into simpler forms within alimentary canal. Draw it with a well labeled diagram of alimentary canal. What would happen in digestion if the gall bladder is removed surgically?

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178
Short2+2= 4Model QuestionSolution available

Compare and contrast areolar and adipose connective tissue.

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