PRACTICE TEST 10 - BIOLOGY, FOR MHT-CET, NEET, AIIMS MEDICAL ENTRANCE EXAM

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BIOLOGY- WITH SCORE AND ANSWERS

WRITE ONLY YOUR NAME AND START PRACTICE TEST *

Which of the following are found in extreme saline conditions ? *

4 points

Eubacteria

Cyanobacteria

Mycobacteria

Archaebacteria

Asymptote in a logistic growth curve is obtained when : *

4 points

K = N

K > N

K < N

The value of 'r' approaches zero

Artificial selection to obtain cows yielding higher milk output represents : *

4 points

Directional as it pushes the mean of the character in one direction

Disruptive as it splits the population into two, one yielding higher output and the other lower output

Stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows

Stabilizing selection as it stabilizes this character in the population

Select the mismatch : *

4 points

Rhodospirillum - Mycorrhiza

Anabaena - Nitrogen fixer

Rhizobium - Alfalfa

Frankia - Alnus

Good vision depends on adequate intake of carotene rich food : Select the best option from the followingstatements :(a) Vitamin A derivatives are formed from carotene(b) The photopigments are embedded in the membrane discs of the inner segment(c) Retinal is a derivative of Vitamin A(d) Retinal is a light absorbing part of all the visual photopigmentsOptions : *

4 points

(a), (c) and (d)

(a) and (c)

(b), (c) and (d)

(a) and (b)

The DNA fragments separated on an agarose gel can be visualised after staining with : *

4 points

Acetocarmine

Aniline blue

Ethidium bromide

Bromophenol blue

The hepatic portal vein drains blood to liverfrom : *

4 points

Stomach

Kidneys

Intestine

Heart

The vascular cambium normally gives rise to : *

4 points

Primary phloem

Secondary xylem

Periderm

Phelloderm

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement : *

4 points

Both are due to a quantitative defect in globin chain synthesis

Thalassemia is due to less synthesis of globin molecules

Sickel cell anemia is due to a quantitative problem of globin molecules

Both are due to a qualitative defect in globin chain synthesis

Which of the following facilitates opening of stomatal aperture ? *

4 points

Decrease in turgidity of guard cells

Radial orientation of cellulose microfibrils in the cell wall of guard cells

Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells

Contraction of outer wall of guard cells

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