NEET TEST SERIES 107 BIOLOGY

1. Which of the following carbohydrates cannot be directly utilized by humans for energy production?

(a) Glucose
(b) Fructose
(c) Cellulose
(d) Sucrose

2. In a T.S. (transverse section) of a young dicot root, the protoxylem is located towards the periphery, and the metaxylem is towards the center. This condition is described as:

(a) Exarch
(b) Endarch
(c) Mesarch
(d) Polyarch

3. The phellogen, phellem, and phelloderm together constitute:

a) Periderm
b) Secondary xylem
c) Secondary phloem
d) Vascular cambium

4. A tissue in the stem of a flowering plant shows living cells with thickened corners due to pectin deposition and is involved in providing flexibility. This tissue is

(a) Sclerenchyma
(b) Collenchyma

(c) Parenchyma

(d) Xylem fibers

5. In an isobilateral leaf, the mesophyll is:

a) Differentiated into palisade and spongy parenchyma
b) Undifferentiated and uniform
c) Absent due to the presence of sclerenchyma
d) Replaced by aerenchyma

6. The plant body of Funaria is

a) completely sporophyte
b) predominantly gametophyte sporophyte
c) completely gametophyte with
d) predominantly gametophyte

7. In a cymose inflorescence the main axis

(a) has unlimited growth
(b) bears a solitary flower
(c) has unlimited growth but lateral branches end in flowers
(d) terminates in a flower

8. Hypanthodium is a specialised type of

(a) fruit
(b) inflorescence
(c) thalamus
(d) ovary.

9. An aggregate fruit is one which develops from

(a) multicarpellary syncarpous gynoecium
(b) multicarpellary apocarpous gynoecium
(c) complete inflorescence
(d) multicarpellary superior ovary

10. Which of the following statements with respect to endoplasmic reticulum is incorrect?

(a) RER has ribosomes attached to ER
(b) SER is devoid of ribosomes
(c) In prokaryotes only RER are present
(d) SER are the sites for lipid synthesis

11. In mitochondria, cristae act as sites for

(a) protein synthesis
(b) phosphorylation of flavoproteins
(c) breakdown of macromolecules
(d) oxidation-reduction reaction

12. The pyrenoids are made up of

(a) proteinaceous centre and starchy sheath
(b) core of nucleic acid surrounded by protein sheath
(c) core of protein surrounded by fatty sheath
(d) core of starch surrounded by sheath of protein.

13. Which one of the following is common to multicellular fungi, filamentous algae and protonema of mosses?

(a) Diplontic life cycle
(b) Members of Kingdom Plantae
(c) Mode of nutrition
(d) Multiplication by fragmentation

14. In gymnosperms, the pollen chamber represents

a) a cavity in the ovule in which pollen grains are stored after pollination
b) an opening in the megagametophyte through which the pollen tube approaches the egg
c) the microsporangium in which pollen grains develop
d) a cell in the pollen grain in which the sperms are formed.

15. In unilocular ovary with a single ovule, the placentation is

(a) marginal
(b) free central
(c) basal
(d) axile

16. The floral formula is that of

(a) soybean
(b) sunhemp
(c) tobacco
(d) tulip.

17. Which one of the following is not a constituent of cell membrane?

(a) Glycolipids
(b) Proline
(c) Phospholipids
(d) Cholesterol

18. Microtubules are the constituents of

(a) centrioles, spindle fibres and chromatin
(b) centrosome, nucleosome and centrioles
(c) cilia, flagella and peroxisomes
(d) spindle fibres, centrioles and cili(a)

19. Meiosis II performs

(a) separation of sex chromosomes
(b) synthesis of DNA and centromere
(c) separation of homologous chromosomes
(d) separation of chromatids.

20. Mitotic anaphase differs from metaphase in possessing

a) same number of chromosomes and same number of chromatids
b) half number of chromosomes and half number of chromatids
c) half number of chromosomes and same number of chromatids
d) same number of chromosomes and half number of chromatids.