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 | |
In which one of the family formations of endosperm doesn’t take place?
Orchidaceae
Cactaceae
Ranunculaceae
Malvaceae
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
Pyloric sphincter guards the opening between
Stomach and Duodenum
Cardia and Fundus
Oesophagus and Stomach
Fundus and Pylorus
Source of commercial chewing gum latex is
Hevea brasiliensis
Carica papaya
Ficus elastica
Achras sapota
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
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)
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
