Monday 26 August 2019

HUMAN HEALTH & DISEASES (Class XII)



As per the new CBSE question paper pattern, the proportion of objective questions has been increased substantially. during the Board 2020, it is expected that at least 25% marks would be devoted to 1 mark questions, which will be mostly application based.
So here are some  1 mark questions from Lesson 8 of XII NCERT "Human health & Diseases.
all these questions are strictly from NCERT. so if you are not able to do 5 or more questions; you need to read the lesson again & again.                                                            
👍👍                                   
1-mark questions                

1.      Parasites that cause diseases are known as _________

2.      Mary Mallon was made famous due to her tolerance to a bacterial disease, of which she was a carrier, and hence she was known as ____________.

3.      Cough due to pneumonia can be differentiated from cough due to common cold as in prior ___________ are also affected.

4.      _______________ is the most serious type of malaria, it is caused due to ___________

5.      The initial attack of Plasmodium takes place in _______________ while that of HIV takes place in _________

6.      Primary host of Plasmodium is ________________, & secondary host is _________.

7.      Fertilization of Plasmodium takes place in mosquito’s ___________________

8.      Biocontrol agent used for controlling mosquito larva is _________________.

9.      Besides Dengue, Aedes mosquito are vectors of another viral disease with widespread occurrence in recent years. Name the disease.

10.  _____________________ is the carrier of Entamoeba.

11.  A used comb was placed in the hotel room, which was used by Radha during her stay there. Later that week she felt dry scaly lesions on her scalp & severe itching. What kind of infection could she have acquired?

12.  Write one example of a physiological barrier.

13.  Full forms: PMNL, CMI IgA, MALT, ELISA, NACO

14.  Anamnestic response is due to ____________________ (property) of our immune system.

15.  _________________ immune response is responsible for graft rejection.

16.  A new born child receives antibodies from his mother through _______________ during pregnancy and through ______________ after birth. Both these are examples of ______________ immunity.

17.  Recombinant DNA technology is being used to produce _______________ vaccine using _______________ (name of organism).

18.  _______________ disease has been completely eradicated due to immunization.

19.  _____________ cells are responsible for allergy since they release chemicals like _____________ & _____________. In order to control allergy, doctors recommend _____________ & ____________.

20.  Which enzyme is required for integration of retrovirus genome into human genome?

21.  Is it true that HIV infected cells can survive even when new viruses are being formed and released from it? How does this effect appearance of disease symptoms?



22.  Regulation of cell division in normal mitotic cells is due to ________

23.  ________________ changes benign tumours to malignant tumours.

24.  Both CT & Radiography use X ray? How are the two different?



25.  Neoplastic cells are different from normal cells. This property is used for histopathological studies to detect _______________ (disease)

26.  ______________ are given to activate immune response of AIDS patients.

27.  _______________________ are group of drugs used in doping by sportsperson.

28.  Smack is a depressant obtained from ___________________ of morphine.

29.  Physiological response of body dependent on drugs, when drugs are no more taken __________________

30.  ________________ is caused due to liver damage by alcoholism.

31.  Anabolic steroids are taken by sportspersons to increase ____________, but in women may also lead to ___________________.

32.  Circle the odd one out:

a.       Plague, Diphtheria, Typhoid, Dengue

b.      Rhinovirus, RetroVirus, Bacteriophage, Oncovirus

c.       Amoebiasis, malaria, ascariasis, typhoid

d.      Microsporum, Trichophyton, Epidermophyton, Ringworm

e.      Malaria, Amoebiasis, filariasis, typhoid

f.        Monocytes, Killer T Lymphocyte, B Lymphocyte, Macrophages

g.       Barbiturates, amphetamines, opioids, bezodiazepines

33.  Fill the missing words in following analogy:

         i.            Bacteria : Antibody :: Virus : ________

       ii.            Ascariais: Ascairs :: Pneumonia : ________

     iii.            Cancer : CT Scan :: Typhoid : _________

     iv.            Human : Sporozoites :: Mosquito : _________

       v.            Immunodeficiency : AIDS :: Auto-immune : _________

     vi.            CT: X ray :: MRI :  __________

   vii.            Tonsils : Throat :: Peyer’s Patches : _________________

 viii.            Cannabinoids : Cannabis sativa :: cocaine : _________________

34.  State True/ False

         i.            Hair loss is a common symptom of Cancer.

       ii.            Dopamine is a hormone whose activity is interfered due to cocaine abuse.

     iii.             Antiretroviral drugs can completely cure AIDS.

     iv.            S in AIDS stands for Symptoms

       v.            While dealing with snakebite patients, doctors should choose passive immunity.

     vi.            Memory of our immune system is an asset but specificity a drawback in developing vaccines.

   vii.            The antigen binding site are present at C terminal of antibody molecule.

 viii.            Only female mosquito is responsible for the spread of Wuchereria.

35.  Who am I?

A.      Reservoir of erythrocytes
B.      Formed at secondary lymphoid organs due to proliferation of lymphocytes as they interact with antigens.
C.      reduce in size with age, but am responsible for immune response
D.     A vestigial organ but also a secondary lymphoid organ 
E.      constitute 50% of lymphoid tissue in your body
F.       HIV Factory
G.     Gene responsible for oncogenic transformation of cells 
H.     Source of hallucinogens 
I.        Drugs for Post-surgical care
J.        Alkaloid that stimulates adrenal glands causing rise in BP & heart rate; also an important carcinogen.

Monday 12 August 2019

Question Paper Class XII Biology

Just conducted a Quarterly exam for class XII, based on Unit 1, & the first 2 lessons of Unit II.

The question paper of 50 marks & 90 Minutes duration is as follows:




The question paper is strictly based on NCERT book, the latest i.e. 2019 edition. And all answers can be found there.
Take time to sit for at least 100 minutes. sit & read the paper for 10 minutes. Understand the questions & thereafter start writing. I've found that 70% of questions are attempted wrong because students fail to understand what is asked.
Try to follow word limit for proper practice for the board examination. 
Good Luck 👍
Do not forget to leave comments, queries if any.