BIOLOGY M.C.Q (1 Marks)

Statement $I$: In $\mathrm{C}_3$ plants, some $\mathrm{O}_2$ binds to $\mathrm{RuBisCO}$, hence $\mathrm{CO}_2$ fixation is decreased.

Statement $II$: In $\mathrm{C}_4$ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration.

In the light of the above statements, choose the correct answer from the options given below:

$A$. Light  $B$. Chlorophyll  $C$. $\mathrm{CO}_2$  $D$. $ATP$   $E$. $NADPH$

Choose the correct answer from the options given below:

Statement $I$:The primary $CO _{2}$ acceptor in $C _{4}$ plants is phosphoenolpyruvate and is found in the mesophyll cells.

Statement $II:$Mesophyll cells of $C _{4}$ plants lack RuBisCo enzyme.

In the light of the above statements, choose the correct answer from the options given below:

$I.$ Ribulose-$5$-phosphate isomerase    $II.$ Ribulose-$5$-phosphate epimerase

$III.$ Transketolase    $IV.$ Triose phosphate isomerase

$I.PS-II$   $II$. $NADP$ reductase  $III$. non-cyclic photophosphorylation

Select the correct option

$III.$ Enzyme catalyzing reaction that fixes $CO _{2}$    $IV.$ Presence of Calvin cycle

$V.$ Leaf anatomy

Which one does not differ in a $C_{3}$ and $C_{4}$-plants?

Complete the given statement by filling appropriate options in the given blanks

$I$.In $C_{4}$-plants, the primary $C O_{2}$ acceptor is $P E P$.

$II$. In the photosynthetic process, PS-II absorbs energy at or just below $680 \;nm$.

$III$. The pigment that is present in the Pigment System-$I$ is $P$ $680$ .

$II.$ In $C_{4}$-plant, Calvin pathway takes place in the mesophyll cell

Which of the following statements true?

Choose the correct option

$R -$ In $C_4$ plants photorespiration dose note occur.

$R-$ The membrane system of chloroplast is not responsible for trapping the light energy and also for the synthesis of $ATP$ and $NADPH.$

$\begin{array}{|p{0.6\linewidth}|p{0.3\linewidth}|} \hline Column\,\,-I  & Column\,\,-II \\ \hline (p)\,\,Grana\,\,region\,\,of\,\,chloroplast & (i)\,\,Krab's\,\,cycle \\ \hline (q)\,\,Stroma\,\,region\,\,of\,\,chloroplast & (ii)\,\,Light\,\,reaction \\ \hline (r)\,\,Cytoplasm  & (iii)\,\,Dark\,\,reaction \\ \hline (s)\,\,Cytoplasm\,\,of\,\,mitochondria & (iv)\,\,Glycolysis \\ \hline \end{array}$

$R -$ In $C_3$ plants $CO_2$ occurs in mesophyll cells and bundle sheath cells.

$R -$ Photorespiration starts with oxygenation of $RuBP.$

$R -$ Photorespiration Occurs in $C_3$ plants.

 $\begin{array}{|p{0.3\linewidth}|p{0.6\linewidth}|} \hline Column\,\,-I & Column\,\,-II  \\ \hline A.\,\,PGA & P.\,\,Act\,\,as\,\,oxigenase\,\,enzyme \\ \hline B.\,\,OAA & Q.\,\,Primary\,\,acceptor\,\,of\,\,CO_2 \\ \hline C.\,\,RuBisCO & R.\,\,First\,\,product\,\,of\,\,C_4\,\,pathway \\ \hline D.\,\,RuBP & S.\,\,First\,\,product\,\,of\,\,C_3\,\,pathway \\ \hline \end{array}$

$A - B - C - D$

$A - B$

Here $A$ and $B$ refer to

$I$.Photo inbibition     $II$. Photo-oxidation    $III$. Photo-reduction

Select the/correct option which matches with statement

Here $A$ and $B$ refer to

Here $A$ and $B$ refer to

$R -$ The concentration of $CO_2$ is between $0.03$ and $0.04$ percent. Increase in concentration upto $0.005$ percent can cause an increase in $CO_2$ fixation rates.

$(I)$ Humidity in atmosphere is relatively more in the area where light become limiting factor for plants

$(II)$ Increase in light as factor affecting photosynthesis beyond a point causes breakdown of chlorophyll and a decrease in photosynthesis occurs

$(III)$ The $C_4$ plants respond to higher temperatures and show higher rates of photosynthesis while $C_3$ plants have a much lower temperature optimum

$I.$ Lysosome    $II.$ Chloroplast    $III.$ Peroxisome   $IV.$ Mitochondria

Choose the correct option

$II-$ It is the characteristic of $C_3-$ plants

$III-$ It occurs in chloroplast

$IV-$ It occurs in day time

$V-$ It occurs in night

Select the correct option in relation, to photorespiration

Correct Sentences $-$ Incorrect Sentences

$III.$ Lack photorespiration    $IV.$ Greater productivity of biomass

These are the probable characters of

$I$. Picric acid $II$. $O AA$

$III$. Malic acid $IV$. Aspartic acid

Select the correct option

$I$. Kranz anatomy   $II$. Oxaloacetic acid    $III$. Large bundle sheath cells

$IV$. Found only in desert area

$(1)$ $C_4$ plants do not tolerate higher temperature.

$(2)$ $C_4$ plants show a response to high light intensities

$(3)$ $C_4$ plants lack a process called photorepiration.

$(4)$ Productivity of $C_4$ plants is less than $C_3$ plants.

$(5)$ $C_4$ acid $OAA$ is formed in the mesophyll in cells.

 $\begin{array}{|p{0.6\linewidth}|p{0.3\linewidth}|} \hline Column\,\,-I   & Column\,\,-II \\ \hline (1)\,\,Molecule\,\,transport\,\,from\,\,chloroplast\,\,to\,\,peroxisome. & (p)\,\,Glycine \\ \hline (2)\,\,Molecule\,\,transport\,\,from\,\,peroxisome\,\,to\,\,mitochondria & (q)\,\,serine \\ \hline (3)\,\,molecule\,\,transport\,\,from\,\,mitochondria\,\,to\,\,peroxisome & (r)\,\,Glycerate \\ \hline (4)\,\,Molecule\,\,transport\,\,from\,\,peroxisome\,\,to\,\,chloroplast & (s)\,\,Glycolate \\ \hline \end{array}$

Mesophy $II$ $-$ Bundle sheath

$1.$ Thick wall.

$2.$ Intercellular space is present.

$3.$ Impervious to gaseous exchange.

$4.$ Contain grana.

$5.$ Contain thyllakoid.

$I.$carboxylation    $II.$ ligation    $III.$ reduction      $IV.$ regeneration

Select the correct option

$R-$ In stroma, enzymatic reactions incorporate $CO_2$ into the plant leading to the synthesis of sugar.

$R-$ RuBisCo is the most abundant enzyme in the world.