KNEC KCSE BIOLOGY TOPICAL QUESTIONS

K.C.S.E Biology Q & A - MODEL 2019PP1QN25

2/7/2020

K.C.S.E Biology Q & A - MODEL 2019PP1QN25

State one characteristic of muscles responsible for each of the following:
(a) peristaltic movement
(b) movement of limbs

answers

(a) spindle shape
Lack striations/ not striated
Uninucleated /one nucleus

(b) striated;
Numerous mitochondrion;
Multinucleated/many nucleus
Cylindrical shaped.

Comments

K.C.S.E Biology Q & A - MODEL 2018PP2QN04

1/7/2020

Comments

K.C.S.E Biology Q & A - MODEL 2018PP2QN04

The diagram below illustrates the arrangement of bones in a human arm.

(a) Name:
(i) the type of joints formed at points H and M.
H
M
(ii) bone G
(b) Name bone J and state how it is adapted to its functions.
Name
Adaptation
(c) State one functional difference between a tendon and a ligament.

answers

a) i. H-Ball and socket (joint);
M - Gliding/planar/plane
ii. Clavicle;
b) Scapula;
Has a spine to increase surface area for muscle attachment;
It is broad/flat to increase the surface area for muscle attachment;
Forms flexible attachment above the ribs that allows movement of the arms;
Has a glenoid cavity/depression for articulation with the humerus/forming the ball and socket joint;
Has acromion for articulation with clavicle/for muscle attachment;
Has coracoid process to increase surface area for muscle attachment;
c) Ligaments hold the bones together (at a joint) while tendons attach muscles to bones;

Comments

K.C.S.E Biology Q & A - MODEL 2018PP2QN03

1/7/2020

Comments

K.C.S.E Biology Q & A - MODEL 2018PP2QN03

The amount of blood flowing tough certain pans in the mammalian body at different activity levels was measured and results tabulated as Shows in the table below.

(a) Account for:
(i) the high blood flow through the cardiac and skeletal muscles during strenuous exercises.
(ii) the results obtained for the alimentary canal at rest.
(b)Name two waste materials excreted by both the skin and the kidneys.

answers

Comments

State two ways in which plants with weak stems obtain mechanical support.

1/7/2020

Comments

K.C.S.E Biology Q & A - MODEL 2018PP1QN21

State two ways in which plants with weak stems obtain mechanical support.

answers

Twinning around a support;
Use of tendrils/spines/thorns/hooks (to cling on nearby plants/trees);
Turgid cells (in their stems);

Comments

Name the bones that articulate to form a ball and socket joint at the hip.

1/7/2020

Comments

K.C.S.E Biology Q & A - MODEL 2018PP1QN16

Name the bones that articulate to form a ball and socket joint at the hip.

answers

Femur;
Pelvic girdle;

Comments

K.C.S.E Biology Q & A - MODEL 2016PP2QN03

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2016PP2QN03

The diagram below represents bones at a joint found in the hind limb of a mammal.

(a) Name the bones labeled X, Y and Z
X
Y
Z
(b) (i) Name the substance fi)und in the place labeled W.
(ii) State the function of the substance named in (b) (î) above.
(c) Name the structure that joins hones together at the joint.
(d) State the difference between ball and socket joint and the one illustrated in the diagram above.
(e) Name the structure at the elbow that performs the same function as the patella.

ANSWERS

(a) X- Femur
Y- Tibia
Z- Fibula
(b) (i) Synovial fluid
(ii) Lubrication of the joint/ shock absorption
Distribution of pressure
(c) Ligament
(d) Ball and socket joint allows movement in all planes while the illustrated allows movement in one plane only. Accept 360 for all planes 180 for one plane
(e) Olecranon process

Comments

Name two tissues in plants that provide mechanical support

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN29

Name two tissues in plants that provide mechanical support

ANSWERS

Xylem tissues
Collenchyma tissues
Sclerenchyma tissues
Parenchyma tissues

Comments

State a characteristic that is common to all cervical vertebrae

30/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN29

State a characteristic that is common to all cervical vertebrae

ANSWER

Have short neural spines

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN01

29/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2016PP1QN01

Name the type of muscles found in the following organs.
Stomach
Bone

answers

Stomach - Visceral muscles/ smooth muscle.
Bone - Skeletal muscles

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN21

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN21

Name the type of skeleton that makes tip each of the following animals:
(a) locust
(b) bird.

ANSWERS

(a) Exoskeleton;
(b) Endoskeleton;

Comments

Distinguish between a tendon and a ligament.

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN15

Distinguish between a tendon and a ligament.

ANSWERS

Tendon is a (inelastic) tissue that attaches muscles to bones while Ligament is a (inelastic) tissue that attaches a bone to another bone of a movable joint:

Comments

Which type of mammalian muscles is voluntary’?

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN15

Which type of mammalian muscles is voluntary’?

ANSWER

Skeletal muscles / striated muscles:

Comments

State two functions of intervertebral discs in the mammalian skeleton.

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2014PP1QN09

State two functions of intervertebral discs in the mammalian skeleton.

ANSWERS

Act as shock absorbers;
Allow smooth movement between the vertebrae/reduce friction;

Comments

K.C.S.E Biology Q & A - MODEL 2013PP2QN05

28/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP2QN05

The diagram below represents a mammalian pelvic girdle.

(a) How are the structures labelled H and J adapted to their function?
(i) H
(ii) J
(b) State the function of obturator foramen.
(c) (i) Name the bone that articulates with the pelvic girdle at acetabulum.
(ii) Name the type of joint formed by the acetabulum and the bone named in (c)(i) above.
(d) Name the bone formed by the fusion of caudal vertebrae inhuman beings.

answers

Comments

State two functions of pelvic girdle in mammals.

26/6/2020

Comments

K.C.S.E Biology Q & A - MODEL 2013PP1QN29

State two functions of pelvic girdle in mammals.

answers

Form-joints with the legs to make walking possible:
Provide large surface area for attachment of muscles;
Offers support (to the body weight)

Comments

<<Previous

K.C.S.E Biology Q & A - MODEL 2019PP1QN25

K.C.S.E Biology Q & A - MODEL 2019PP1QN25

K.C.S.E Biology Q & A - MODEL 2018PP2QN04

K.C.S.E Biology Q & A - MODEL 2018PP2QN04

K.C.S.E Biology Q & A - MODEL 2018PP2QN03

K.C.S.E Biology Q & A - MODEL 2018PP2QN03

State two ways in which plants with weak stems obtain mechanical support.

State two ways in which plants with weak stems obtain mechanical support.

Name the bones that articulate to form a ball and socket joint at the hip.

Name the bones that articulate to form a ball and socket joint at the hip.

K.C.S.E Biology Q & A - MODEL 2016PP2QN03

K.C.S.E Biology Q & A - MODEL 2016PP2QN03

Name two tissues in plants that provide mechanical support

Name two tissues in plants that provide mechanical support

State a characteristic that is common to all cervical vertebrae

State a characteristic that is common to all cervical vertebrae

K.C.S.E Biology Q & A - MODEL 2016PP1QN01

K.C.S.E Biology Q & A - MODEL 2016PP1QN01

K.C.S.E Biology Q & A - MODEL 2014PP1QN21

K.C.S.E Biology Q & A - MODEL 2014PP1QN21

Distinguish between a tendon and a ligament.

Distinguish between a tendon and a ligament.

Which type of mammalian muscles is voluntary’?

Which type of mammalian muscles is voluntary’?

State two functions of intervertebral discs in the mammalian skeleton.

State two functions of intervertebral discs in the mammalian skeleton.

K.C.S.E Biology Q & A - MODEL 2013PP2QN05

K.C.S.E Biology Q & A - MODEL 2013PP2QN05

State two functions of pelvic girdle in mammals.

State two functions of pelvic girdle in mammals.

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