Oxygenic photosynthesis occurs in

• Chromatium

• Oscillatoria

• Rhodospirillum

• Rhodospirillum

Plasmodesmata are

• lignified cemented layers between cells

• locomotory structures

• membranes connecting the nucleus with the plasmalemma

• membranes connecting the nucleus with the plasmalemma

In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?

• R-repolarisation of ventricles

• S- start of systole

• T -end of diastole

• T -end of diastole

In barley stem, vascular bundles are

• open and scattered

• closed and scattered

• open and in a ring

• open and in a ring

If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is

• excretory fluid

• coelomic fluid

• haemolymph

• haemolymph

Middle lamella is mainly composed of 

• hemicellulose

• muramic acid

• calcium pectate

• calcium pectate

Which one of the following are the correct pairing of a body part and the kind of muscle tissue that moves it?

• Heart wall - Involuntary unstriated muscle

• Biceps of upper arm - smooth muscle fibres

• Abdominal wall - Smooth muscle

• Abdominal wall - Smooth muscle

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is

• maturing

• elongating

• widening

• widening

The genetic defect-Adenosine Deaminase (ADA) deficiency may be cured permanently by

• periodic infusion of genetically engineered lymphocytes having functional ADA cDNA

• administering denosine deaminase activators

• introducing bone marrow cells producing ADA into cells at early embryonic stages

• introducing bone marrow cells producing ADA into cells at early embryonic stages

Which part of human brain is concerned with the regulation of body temperature?

• Medulla oblongata

• cerebellum

• cerebrum

• cerebrum