MCQ
Nucleoside is:
- A$A$ and $B$
- ✓$B$ and $C$
- C$C$ and $D$
- D$D$ and $A$
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$I.$ Meiosis involves pairing of homologous chromosomes and recombinatio between them
$II.$ Two diploid cells are formed at the end of meiosis-$II$
$III.$ Meiosis involves two sequential cycles of nuclear and cell division calle meiosis-$I$ and meiosis-$II$, but only a single cycle of $DNA$ replication
$IV$. Meiosis-$I$ is initiated after the parental chromosome replication which produce identical sister chromatids at the S-phase
The correct option is
$A$. Asexual reproduction occurs usually by biflagellate zoospores.
$B$. Sexual reproduction is by oogamous method only.
$C$. Stored food is in the form of carbohydrates which is either mannitol or laminarin.
$D$. The major pigments found are chlorophyll $a$, $c$ and carotenoids and xanthophyll.
$E$. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
Choose the correct answer from the options given below:
$(i)$ Plant cells have centrioles which are absent in almost all animal cells.
$(ii)$ Ribosomes are the site of protein synthesis.
$(iii)$ The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
$(iv)$ In animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum.
Of the above statements