Zoology - Online Test
Q1. In yeast the cell cycle is progressed through
Answer : Option D
Explaination / Solution:
Yeast can progress through the cell cycle in only about 90 minutes due to its simple organisation.
Q2. Brief exposure of cells to an electric field also allow the bacteria to take up DNA and this process is called as
Answer : Option B
Explaination / Solution:
Electroporation, or electropermeabilization, is a microbiology technique in which an electrical field is applied to cells in order to increase the permeability of the cell membrane, allowing chemicals, drugs, or DNA to be introduced into the cell.
Q3. Urinary bladder is absent in :
Answer : Option D
Explaination / Solution:
Urinary bladder is absent in snake and bird because the urine of these is semi-solid consisting mainly of uric acid. The primary function of urinary bladder is to store urine in mammals. The urinary bladder cannot store semi-solid urine.
Q4. Fossils are most commonly preserved in
Answer : Option B
Explaination / Solution:
Fossils are dead remains of plants and animals buried inside the earth crust millions of year ago. Fossils are commonly preserved in sedimentary rock as this kinds of rocks are formed layer by layer in course of time.
Q5. A binomial nomenclature has _________________ words.
Answer : Option D
Explaination / Solution:
The first word in a biological name represents the genus while the second component denotes the specific epithet. Hence, the correct option is Two.
Q6. Discovery of actin is credited to
Answer : Option D
Explaination / Solution:
Actin and myosin filaments are responsible for contraction and relaxation of muscle. The discovery of actin is credited to Straub.
Q7. Bt toxin is coded by which gene?
Answer : Option D
Explaination / Solution:
The Bt toxin is encoded by the cry gene. The cry I AC and cry II Ab control cotton boll worms, while the cry I Ab controls corn borer. Bt gene produces Bt toxin. This toxin provides resistance to plants against lepidopteron, coleopteron and dipterans pests.
Q8. In ET technique embryo is transferred into
Answer : Option B
Explaination / Solution:
In ET (embryo transfer) technique, in vitro fertilized embryo is transferred into fallopian tube or uterus for further development.
Q9. Fibres and fibroblasts are compactly packed in
Answer : Option D
Explaination / Solution:
Dense irregular connective tissue provide strength to body parts. Hence the cells and fibres are packed compactly.
Q10. Which kingdom brought Chlorella and Chlamydomonas with Paramoecium and Amoeba?
Answer : Option C
Explaination / Solution:
Kingdom Protista has brought together Chlamydomonas, Chlorella which were earlier placed in Algae within Plants and (both having cell walls) with Paramoeciumand Amoeba which were earlier placed in the animal kingdom which lack it.
