Life sciences 1

Stomata Closes when

(i) when it needs carbon diaoxide for photosynthesis

(ii)when it does not needs carbon diaoxide for photosynthesis

(iii) water flows out of guard cell

(iv) water flows in guard cell

• (i) only

• (i) and (iii)

• (ii) and (iii)

• (ii) and (iv)

The chlorophyll in photosynthesis is used for

• absorbing light

• breaking down water molecule

•  No function

       

• Reduction of CO₂

Proteins after digestion are converted into ___

• Carbohydrates

       

• Small globules

• Amino acids

• starch

Main site of photosynthesis ___

• leaf

• stem

• guard cell

• chloroplast

 Photosynthesis is a

• Catabolic process

       

• Parabolic process

   

• Amphibolic process

• Photochemical process

Blood consist of what fluid medium?

• Lymph

• Platelets

• Plasma

• All of these

One cell-thick vessels are called

• Arteries

• Veins

   

• Capillaries

• Pulmonary artery

 Respiratory pigment in human body is

  

• Chlorophyll

• Water

• Blood

• haemoglobin

Which of these juices is secreted by pancreas?

•  Trypsin

        

• Pepsin

• Bile juice

• Both I and II

Which element is used in the synthesis of proteins?

•   Hydrogen

      

• Oxygen

• Nitrogen

• Carbon dioxide