Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

In which one of the family formations of endosperm doesn’t take place?

  • Orchidaceae

  • Cactaceae

  • Ranunculaceae

  • Malvaceae


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12.

In cardiac cycle maximum time is taken by

  • Atria systole

  • Atria diastole

  • Ventricle systole

  • Ventricle diastole


B.

Atria diastole

The cardiac cycle is the event during, which one heartbeat or one cycle of contraction (systole) and relaxation (diastole) of cardiac muscle occurs. A cardiac cycle consists of systole and diastole of atria and systole and diastole of ventricles. The time of cardiac cycle is in reverse ratio of the rate of heartbeat. In man, the heart rate is about 72 times/train, therefore time of a cardiac cycle is 60/72 -0.8 sec approx\

Time Taken Atria Ventricle
Systole Diastole Systole Diastole
0.1 sec 0.7 sec 0.03 sec 0.5 sec


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13.

A horse and a donkey can breed to produce mule which is an infertile animal. The infertility is because horse and donkey belong to different.

  • Class

  • Order

  • Species

  • Genus


14.

Source of commercial chewing gum latex is

  • Hevea brasiliensis

  • Carica papaya

  • Ficus elastica

  • Achras sapota


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15.

 Match the following Columns.

Column I (Cell Organelle) Column II (Discovered by)
A. Ribosome 1. Fontana
B. Nucleolus 2. Tolbert and Yamazaki
C. Glyoxysome 3. Palade
D. Peroxisome 4. Beevers

  • A – 1; B – 4; C – 2; D – 3

  • A – 3; B – 4; C – 1; D – 2

  •  A – 1; B – 3; C – 2; D – 4

  • A – 3; B – 1; C – 4; D – 2


16.

 Match the following Columns.

Column I (organism) Column II (Connecting Link)
A. Echina 1. Between Annelida and Mollusca
B. Peripatus 2. Between Reptiles and Mammals
C. Neopilina 3. Between Annelida and Arthropoda
D. Protopterus 4. Between Pisces and Amphibian

  • A – 4; B – 3; C – 2; D – 1

  • A – 2; B – 3; C – 1; D – 4

  • A – 3; B – 1; C – 2; D – 4

  • A – 4; B – 2; C – 1; D – 3


17.

Which one of the following is not correct pair of type of cancer and origin place?

  • Benign tumour – Non-cancerous tumour

  • Carcinomas – Cancer of epithelial tissues

  • Lymphomas – Haematopoietic cells tumour

  • Sarcomas – Cancer of glands (secretory tissues)


18.

The Sub-units of 80S ribosome will be

  • 40S, 40S

  •  60S, 40S

  • 60S, 20S

  • 55S, 25S


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19.

Pyloric sphincter guards the opening between

  • Stomach and Duodenum

  • Cardia and Fundus

  • Oesophagus and Stomach

  • Fundus and Pylorus


20.

Vegetative propagation of Bryophyllus takes place through

  • Bulbil

  • Corms

  • Leaf buds

  • Eyes


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